I. A person is eligible to participate in the program if the person qualifies under one of the following categories:
(a) The person is not liable under RSA 147-B for any release or threatened release of a contaminant or contaminants at the property and is either:
(1) A prospective purchaser of eligible property; or
(2) A person who holds a mortgage interest or other security interest in eligible property, including a municipality with respect to property on which there are overdue real estate taxes due to the municipality.
(b) The person, including a municipality, is a current owner of eligible property whose liability under RSA 147-B is based solely on the person's status as owner and who did not cause or contribute to the contamination at the property.