(a) The freestanding psychiatric hospital modernized assessment imposed under this Part shall apply to all freestanding psychiatric hospitals.
(b) The freestanding psychiatric hospital modernized assessment shall be assessed as a percentage of each freestanding psychiatric hospital's hospital costs. The assessment percentage shall be calculated quarterly by the Department of Health and Human Services in accordance with this Part. The percentage for each quarter shall equal the modernized freestanding psychiatric hospital HASP component under G.S. 108A-146.10A divided by the total hospital costs for all freestanding psychiatric hospitals holding a license on the first day of the assessment quarter.