Regulations for the performance of the national anthem are set forth in the law signed by President Putin on 25 December 2000. While a performance of the anthem may include only music, only words, or a combination of both, the anthem must be performed using the official music and words prescribed by law. Once a performance has been recorded, it may be used for any purpose, such as in a radio or television broadcast. The anthem may be played for solemn or celebratory occasions, such as the annual Victory Day parade in Moscow, or the funerals of heads of state and other significant figures. When asked about playing the anthem during the Victory Day parades, Defense Minister Anatoliy Serdyukov stated that because of the acoustics of the Red Square, only an orchestra would be used because voices would be swallowed by the echo.