Not later than July 31, 2015, the Commissioner of Energy and Environmental Protection shall amend the Adopt-A-Park program to additionally provide for the recognition of participants who elect to financially sponsor such park, through contribution of a charitable donation, by erecting a placard at such park that bears the name of any such sponsoring individual, individuals, organization or corporation and the nature of such financial sponsorship. The commissioner may establish multiple tiers for such financial sponsorship provided no level of charitable donation for such financial sponsorship shall be less than two thousand five hundred dollars.