((a)) ** .—** A person who is required under an agreement under to serve in the Selected Reserve shall serve not less than 12 days of active duty for training each year during the period of service required by the agreement.

((b)) ** .—** A person who is required under an agreement under to serve in the Individual Ready Reserve shall serve—

((1)) not less than 30 days of initial active duty for training; and

((2)) not less than five days of active duty for training each year during the period of service required by the agreement.