Letter of Instructions No. 1043 (Effectivity Date - November 18, 1980)

July 16, 1980
On the Procurement of Books and other Aids for the Public Schools

Letter of Instructions No. 1042

July 10, 1980
On the Supply Support Agreements (SSA)

Letter of Instructions No. 755 (Effectivity Date - December 19, 1978)

October 18, 1978
Relative to the Establishment of an Integrated Procurement System for the National Government and its Instrumentalities

Letter of Instructions No. 630

November 22, 1977
On Nationality Requirement in Civil Works