N.H. Rev. Stat. § 109:7
Any state, other than the state of New Hampshire, or any municipality within or outside of the state of New Hampshire, which receives emergency fire assistance pursuant to the provisions of this chapter, shall reimburse the municipality which furnishes such aid for the compensation which was paid to fire-fighting employees engaged in such assistance; for actual travel and maintenance expense for such employees while rendering such aid; and for all payments to or on behalf of injured employees or to representatives of deceased employees, in case any employees sustain injury or are killed while rendering assistance pursuant to this chapter in municipalities other than those to whose fire departments they are attached.
RSA 109:7
1949, 257:1, par. 7, eff. June 16, 1949.