(a) A PROMISE scholarship annual award shall meet the following conditions:
(1) For a student enrolled in a state institution of higher education, the annual award is equal to the lesser of the cost of tuition or $4,750, except that a student who was awarded and used a PROMISE scholarship annual award prior to January 1, 2010, shall continue to receive the annual award calculated under the same terms and conditions that applied on the day before the effective date of this article;