<SEC-DOCUMENT>0000797923-19-000022-index.html : 20190827
<SEC-HEADER>0000797923-19-000022.hdr.sgml : 20190827
<ACCEPTANCE-DATETIME>20190827161512
ACCESSION NUMBER:		0000797923-19-000022
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		58
FILED AS OF DATE:		20190827
DATE AS OF CHANGE:		20190827
EFFECTIVENESS DATE:		20190830

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BNY Mellon Opportunistic Municipal Securities Fund
		CENTRAL INDEX KEY:			0000797923
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0430

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-07496
		FILM NUMBER:		191057435

	BUSINESS ADDRESS:	
		STREET 1:		C/O BNY MELLON INVESTMENT ADVISER, INC.
		STREET 2:		240 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10286
		BUSINESS PHONE:		2129226400

	MAIL ADDRESS:	
		STREET 1:		C/O BNY MELLON INVESTMENT ADVISER, INC.
		STREET 2:		240 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10286

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DREYFUS MUNICIPAL BOND OPPORTUNITY FUND
		DATE OF NAME CHANGE:	20081201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DREYFUS PREMIER MUNICIPAL BOND FUND
		DATE OF NAME CHANGE:	19970605

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PREMIER MUNICIPAL BOND FUND
		DATE OF NAME CHANGE:	19920703

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BNY Mellon Opportunistic Municipal Securities Fund
		CENTRAL INDEX KEY:			0000797923
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0430

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04764
		FILM NUMBER:		191057434

	BUSINESS ADDRESS:	
		STREET 1:		C/O BNY MELLON INVESTMENT ADVISER, INC.
		STREET 2:		240 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10286
		BUSINESS PHONE:		2129226400

	MAIL ADDRESS:	
		STREET 1:		C/O BNY MELLON INVESTMENT ADVISER, INC.
		STREET 2:		240 GREENWICH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10286

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DREYFUS MUNICIPAL BOND OPPORTUNITY FUND
		DATE OF NAME CHANGE:	20081201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DREYFUS PREMIER MUNICIPAL BOND FUND
		DATE OF NAME CHANGE:	19970605

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PREMIER MUNICIPAL BOND FUND
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000797923
<SERIES-ID>S000000090
<SERIES-NAME>BNY Mellon Opportunistic Municipal Securities Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000000131
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>PTEBX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000000133
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>DMBCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000001400
<CLASS-CONTRACT-NAME>Class Z
<CLASS-CONTRACT-TICKER-SYMBOL>DMBZX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000173299
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>DMBYX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000173300
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>DMBVX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>lp1-022.htm
<DESCRIPTION>POST-EFFECTIVE AMENDMENT NO. 61
<TEXT>
Document 1 - file: lp1-022.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A CHARTER
<SEQUENCE>2
<FILENAME>articlesofamendment.htm
<DESCRIPTION>ARTICLES OF AMENDMENT
<TEXT>
Document 2 - file: articlesofamendment.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.D ADVSR CONTR
<SEQUENCE>3
<FILENAME>mgmtagmt-bnymomsfrebranding2.htm
<DESCRIPTION>MANAGEMENT AGREEMENT
<TEXT>
Document 3 - file: mgmtagmt-bnymomsfrebranding2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.E UNDR CONTR
<SEQUENCE>4
<FILENAME>distributionagremt.htm
<DESCRIPTION>DISTRIBUTION AGREEMENT
<TEXT>
Document 4 - file: distributionagremt.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.E UNDR CONTR
<SEQUENCE>5
<FILENAME>bdsellingagreement-619.htm
<DESCRIPTION>BROKER-DEALER SELLING AGREEMENT
<TEXT>
Document 5 - file: bdsellingagreement-619.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.E UNDR CONTR
<SEQUENCE>6
<FILENAME>banksellingagreement-619.htm
<DESCRIPTION>BANK SELLING AGREEMENT
<TEXT>
Document 6 - file: banksellingagreement-619.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.H OTH MAT CONT
<SEQUENCE>7
<FILENAME>sservicesplan-bnymomsf2019r1.htm
<DESCRIPTION>SHAREHOLDERS SERVICES PLAN
<TEXT>
Document 7 - file: sservicesplan-bnymomsf2019r1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.J OTHER OPININ
<SEQUENCE>8
<FILENAME>consent022.htm
<DESCRIPTION>CONSENT OF INDEPENDENT ACCOUNTANT
<TEXT>
Document 8 - file: consent022.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.M 12B-1 PLAN
<SEQUENCE>9
<FILENAME>distributionplan-bnymomsf202.htm
<DESCRIPTION>DISTRIBUTION PLAN
<TEXT>
Document 9 - file: distributionplan-bnymomsf202.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.N 18F-3 PLAN
<SEQUENCE>10
<FILENAME>rule18f3plan.htm
<DESCRIPTION>RULE 18F-3 PLAN
<TEXT>
Document 10 - file: rule18f3plan.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.P CODE ETH
<SEQUENCE>11
<FILENAME>persectradpolicy68181.htm
<DESCRIPTION>CODE OF ETHICS
<TEXT>
Document 11 - file: persectradpolicy68181.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>12
<FILENAME>poa3419.htm
<DESCRIPTION>POWER OF ATTORNEY 3-4-19
<TEXT>
Document 12 - file: poa3419.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>13
<FILENAME>poa-larochemorris.htm
<DESCRIPTION>POWER OF ATTORNEY - LAROCHE-MORRIS
<TEXT>
Document 13 - file: poa-larochemorris.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>x19082612045601.jpg
<TEXT>
Document 16 - file: x19082612045601.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>x19082009405700.jpg
<TEXT>
Document 17 - file: x19082009405700.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>x19082009405701.jpg
<TEXT>
Document 18 - file: x19082009405701.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>x19082009405702.jpg
<TEXT>
Document 19 - file: x19082009405702.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>x19082009405703.jpg
<TEXT>
Document 20 - file: x19082009405703.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>x19082009405704.jpg
<TEXT>
Document 21 - file: x19082009405704.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>x19082009405705.jpg
<TEXT>
Document 22 - file: x19082009405705.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>x19082009405800.jpg
<TEXT>
Document 23 - file: x19082009405800.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>x19082009405801.jpg
<TEXT>
Document 24 - file: x19082009405801.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>x19082009405802.jpg
<TEXT>
Document 25 - file: x19082009405802.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>x19082009405803.jpg
<TEXT>
Document 26 - file: x19082009405803.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>x19082009405900.jpg
<TEXT>
Document 27 - file: x19082009405900.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>28
<FILENAME>x19082009405901.jpg
<TEXT>
Document 28 - file: x19082009405901.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>29
<FILENAME>x19082009405902.jpg
<TEXT>
Document 29 - file: x19082009405902.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>30
<FILENAME>x19082009410000.jpg
<TEXT>
Document 30 - file: x19082009410000.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>31
<FILENAME>x19082009410001.jpg
<TEXT>
Document 31 - file: x19082009410001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>32
<FILENAME>x19082009410002.jpg
<TEXT>
Document 32 - file: x19082009410002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>33
<FILENAME>x19082009410003.jpg
<TEXT>
Document 33 - file: x19082009410003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>34
<FILENAME>x19082009410100.jpg
<TEXT>
Document 34 - file: x19082009410100.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>35
<FILENAME>x19082009410101.jpg
<TEXT>
Document 35 - file: x19082009410101.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>36
<FILENAME>x19082009410102.jpg
<TEXT>
Document 36 - file: x19082009410102.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>37
<FILENAME>x19082009410103.jpg
<TEXT>
Document 37 - file: x19082009410103.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>38
<FILENAME>x19082009410200.jpg
<TEXT>
Document 38 - file: x19082009410200.jpg

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<TYPE>GRAPHIC
<SEQUENCE>39
<FILENAME>x19082009410201.jpg
<TEXT>
Document 39 - file: x19082009410201.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>40
<FILENAME>x19082009410202.jpg
<TEXT>
Document 40 - file: x19082009410202.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>41
<FILENAME>x19082009410203.jpg
<TEXT>
Document 41 - file: x19082009410203.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>42
<FILENAME>x19082009410204.jpg
<TEXT>
Document 42 - file: x19082009410204.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>43
<FILENAME>x19082009410300.jpg
<TEXT>
Document 43 - file: x19082009410300.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>44
<FILENAME>x19082009410301.jpg
<TEXT>
Document 44 - file: x19082009410301.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>45
<FILENAME>x19082009410302.jpg
<TEXT>
Document 45 - file: x19082009410302.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>46
<FILENAME>x19082009410303.jpg
<TEXT>
Document 46 - file: x19082009410303.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>47
<FILENAME>x19082009410400.jpg
<TEXT>
Document 47 - file: x19082009410400.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>48
<FILENAME>x19082009410401.jpg
<TEXT>
Document 48 - file: x19082009410401.jpg

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>49
<FILENAME>x19082009410402.jpg
<TEXT>
Document 49 - file: x19082009410402.jpg

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<TYPE>GRAPHIC
<SEQUENCE>50
<FILENAME>x19082009410403.jpg
<TEXT>
Document 50 - file: x19082009410403.jpg

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<SEQUENCE>51
<FILENAME>x19082009410404.jpg
<TEXT>
Document 51 - file: x19082009410404.jpg

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<SEQUENCE>52
<FILENAME>x19082009410500.jpg
<TEXT>
Document 52 - file: x19082009410500.jpg

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<TYPE>GRAPHIC
<SEQUENCE>53
<FILENAME>x19082009410501.jpg
<TEXT>
Document 53 - file: x19082009410501.jpg

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<TYPE>GRAPHIC
<SEQUENCE>54
<FILENAME>x19082009410502.jpg
<TEXT>
Document 54 - file: x19082009410502.jpg

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<SEQUENCE>55
<FILENAME>x19082009410503.jpg
<TEXT>
Document 55 - file: x19082009410503.jpg

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<SEQUENCE>56
<FILENAME>x19082009410504.jpg
<TEXT>
Document 56 - file: x19082009410504.jpg

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<SEQUENCE>57
<FILENAME>x19082009410600.jpg
<TEXT>
Document 57 - file: x19082009410600.jpg

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<SEQUENCE>58
<FILENAME>x19082009410601.jpg
<TEXT>
Document 58 - file: x19082009410601.jpg

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<TYPE>GRAPHIC
<SEQUENCE>59
<FILENAME>x19082009410602.jpg
<TEXT>
Document 59 - file: x19082009410602.jpg

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<TYPE>GRAPHIC
<SEQUENCE>60
<FILENAME>x19082612504500.jpg
<TEXT>
Document 60 - file: x19082612504500.jpg

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