In the case of a member of the armed forces who is on active duty for a period of more than 30 days and whose domicile or permanent duty station is in a State that receives assistance under this chapter, such State shall not charge such member (or the spouse or dependent child of such member) tuition for attendance at a public institution of higher education in the State at a rate that is greater than the rate charged for residents of the State.

If a member of the armed forces (or the spouse or dependent child of a member) pays tuition at a public institution of higher education in a State at a rate determined by subsection (a), the provisions of subsection (a) shall continue to apply to such member, spouse, or dependent while continuously enrolled at that institution, notwithstanding a subsequent change in the permanent duty station of the member to a location outside the State.

This section shall take effect at each public institution of higher education in a State that receives assistance under this chapter for the first period of enrollment at such institution that begins after July 1, 2009.

In this section, the terms “armed forces” and “active duty for a period of more than 30 days” have the meanings given those terms in section 101 of title 10.