In this section the following words have the meanings indicated. “ICF–ID income” means all revenues received by an ICF–ID from any source providing ICF–ID services to residents of the facility. “Intermediate care facility for individuals with an intellectual disability (ICF–ID)” means a State residential center for individuals with an intellectual disability. Each ICF–ID operating in Maryland is subject to an assessment of 6% of all ICF–ID income. The assessment required by this section shall: Be paid by each ICF–ID in accordance with this section; or Terminate if the assessment is not permissible under Section 1903(w) of the Social Security Act. On or before the 15th day of each quarter of the State fiscal year, each ICF–ID shall pay to the Department 6% of the ICF–ID income received during the previous fiscal quarter. For fiscal year 2004, the assessment required by this section shall be paid on or before June 20, 2004, based on the ICF–ID income received during the period from April 1, 2003, through March 31, 2004. The Department may adopt regulations to implement this section.