MOP, Bk 7, v.4, 28
1. The official residence of the President of the Philippines, heretofore referred to as “Malacañan Palace,” shall hereafter be called “Malacañang.”
2. The word “Excellency” shall he omitted in addressing the President of the Philippines. He shall be addressed as “Mr. President.” Letters and other communications will be addressed as follows:
President Ramon Magsaysay Malacañang, Manila
Done in the City of Manila, this 4th day of January, in the year of Our Lord, nineteen hundred and fifty-four, and of the Independence of the Philippines, the eighth.
(Sgd.) RAMON MAGSAYSAY
President of the Philippines
By the President:
(Sgd.) FRED RUIZ CASTRO
Executive Secretary