N.H. Rev. Stat. Ann. § 281-A:23-b

All employers with 5 or more employees shall develop temporary alternative work opportunities for injured employees. If the employee fails to accept temporary alternative work, the employer may petition the commissioner pursuant to RSA 281-A:48, to reduce or end compensation. Notwithstanding RSA 281-A:22, if an injured employee returns to temporary alternative work within 5 days of sustaining the injury, such employee shall be paid workers' compensation from the first date of the injury. The commissioner shall adopt rules under RSA 541-A relative to the administration of this section.