The limitations as to the area within refuges on publicly owned lands and as to distances between refuges as provided for in N.H. Rev. Stat. § 212:11 shall not prohibit the establishment of a game refuge on the Bear Brook area so-called in the towns of Allenstown, Deerfield, Candia and Hooksett transferred from the United States to the state of New Hampshire for public park, recreational and conservation purposes, provided that not less than 2,000 acres within the boundaries of the area shall be open to hunting according to the laws of this state from October 1 to March 15 and that all of said area shall be open to fishing in accordance with the laws of this state. If such a refuge is established, the expense of policing the refuge shall be assumed by the executive director.