RSA 356-C:6 Eviction Protection.

Once notice has been served on the tenant in accordance with RSA 356-C:3, I or II, the tenant shall not be evicted from his dwelling unit except upon the following grounds:
I. Nonpayment of rent or other reasonable charges due under the lease or rental agreement, provided that:
(a) No owner or his agent shall charge, and no tenant shall be liable for, any rent increase other than increases which are based on the unit's pro rata share of increases in insurance, fuel oil, gas, electricity, water or sewer costs, real property taxes and maintenance and operational expenses, which directly or indirectly benefit the tenant. Rental increases are prohibited if based on:
(1) Assessments against the unit for improvements to the converted property; and
(2) Increased tax