Proclamation No. 175, s. 1950 - Signed on April 15, 1950: Revoking Proclamation No. 666, dated January 14, 1941, and declaring all petroleum deposits and petroleum lands covered thereby open to disposition under the provisions of Republic Act No. 387, otherwise known as the Petroleum Act of 1949.

Signed on April 15, 1950: Revoking Proclamation No. 666, dated January 14, 1941, and declaring all petroleum deposits and petroleum lands covered thereby open to disposition under the provisions of Republic Act No. 387, otherwise known as the Petroleum Act of 1949.