No more than 20% of all affordable housing trust funds, exclusive of those collected to fund an RCA prior to July 17, 2008, shall be expended on administration, including, but not limited to, salaries and benefits for municipal employees or consultants' fees necessary to develop or implement a new construction program, prepare and implement a Housing Element and Fair Share Plan, administer an Affirmative Marketing Program and for compliance with the Superior Court and the Program including the costs to the municipality of resolving a challenge.