(a) State agencies which require any persons, agencies, boards, commissions, businesses, or other entities to display signs for individuals with disabilities shall require those persons, agencies, boards, commissions, businesses, or other entities to display only the blue and white international symbol of access.
(b) This section shall have no retroactive effect, applying only to signs installed subsequent to this section's taking effect.
(c) This section shall apply only if installation of a required sign can be achieved without creating a negative financial impact on any persons, agencies, boards, commissions, businesses, or other entities required to display signs for individuals with disabilities.