Exhibit 99.1350CERT

Certification Pursuant to Rule 30a-2(b) under the 1940 Act and
Section 906 of the Sarbanes Oxley Act

Pursuant to 18 U.S.C. § 1350, the undersigned officer of CMA Government Securities Fund and Master
Government Securities LLC (the “registrants”), hereby certifies, to the best of his knowledge, that the
registrants' Report on Form N-CSR for the period ended March 31, 2009, (the “Report”) fully complies
with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the
information contained in the Report fairly presents, in all material respects, the financial condition and
results of operations of the registrants.

Date: May 20, 2009

/s/ Donald C. Burke
Donald C. Burke
Chief Executive Officer (principal executive officer) of
CMA Government Securities Fund and Master Government Securities LLC

Pursuant to 18 U.S.C. § 1350, the undersigned officer of CMA Government Securities Fund and Master
Government Securities LLC (the “registrants”), hereby certifies, to the best of his knowledge, that the
registrants' Report on Form N-CSR for the period ended March 31, 2009, (the “Report”) fully complies
with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended, and that the
information contained in the Report fairly presents, in all material respects, the financial condition and
results of operations of the registrants.

Date: May 20, 2009

/s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
CMA Government Securities Fund and Master Government Securities LLC

This certification is being furnished pursuant to Rule 30a-2(b) under the Investment Company Act of 1940,
as amended, and 18 U.S.C. Section 1350 and is not being filed as part of the Form N-CSR with the
Securities and Exchange Commission.