The Coat of Arms of the Philippines features the eight-rayed sun of the Philippines which represents the provinces of Batangas, Bulacan, Cavite, Manila, Laguna, Nueva Ecija, Pampanga and Tarlac, and the three five-pointed golden-yellow stars representing the three primary geographic regions of Luzon, Visayas, and Mindanao. In the blue field on the left side is the Eagle of the United States, and in the red field on the right is the Lion-Rampant of Spain, both representing colonial history. The design is very similar to the design briefly adopted by the Commonwealth of the Philippines in 1940.
The national coat-of-arms of the Republic was approved by Commonwealth Act No. 731 on July 3, 1946. It was designed by then Captain Galo B. Ocampo, secretary of the Philippine Heraldry Committee. This was subsequently revised in February 12, 1998, under Republic Act 8491.
The words on the scroll have undergone many changes since Philippine independence. From independence in 1946 until 1972, when President Ferdinand Marcos declared martial law, the scroll contained the words "REPUBLIC OF THE PHILIPPINES." From 1979 until the overthrow of Marcos in 1986, the scroll had the words "ISANG BANSA ISANG DIWA" ("One Nation, One Spirit") inscribed. After the overthrow of Marcos, the scroll changed to the current "REPUBLIKA NG PILIPINAS". On February 12, 1998, with the approval of Republic Act No. 8491, the eagle and lion on the lower half of the shield were not specified, and therefore removed. However, the modified arms are not in wide use, pending the ratification of the law by a national referendum called for that purpose, as mandated by the Philippine Constitution.
The national coat-of-arms shall have paleways of two pieces, azure and gules; a chief argent studded with three mullets equidistant from each other; and, in point of honor, ovoid argent over all the sun rayonnant with eight minor lesser rays. Beneath shall be the scroll with the words "REPUBLIKA NG PILIPINAS," enscribed thereon.
Source/Reference: Chan Robles Virtual Library at chanrobles.com / congress.gov.ph / Executive Order 310 (Pres. Arroyo) / Wikipedia / WikiPilipinas