Sec. 23. The President shall address the Congress at the opening of its regular session. He may also appear before it at any other time. (Art. VII, 1987 Constitution)

Not mandatory

Although couched in mandatory language, the first sentence of this provision does not as a rule impose a compellable duty on the President.

State of the Nation Address

The President usually discharges the informing power through the state-of-the-nation address, which is delivered at the opening of the regular session of the legislature. [Cruz, Philippine Political Law, p. 225 and 226 (1995 ed).]