Section 21
SEC. 21. During the flag-raising ceremony, the assembly shall stand in formation facing the flag. At the moment the first note of the anthem is heard, everyone in the premises shall come to attention; moving vehicles shall stop. All persons present shall place their right palms over their chest, those with hats shall uncover; while those in military, scouting, security guard, and citizens military training uniforms shall give the salute prescribed by their regulations, which salute shall be completed upon the last note of the anthem. The assembly shall sing the Philippine national anthem, accompanied by a band, if available, and at the first note, the flag shall be raised briskly. The same procedure shall be observed when the flag is passing in review or in parade.