The commissioner of the department of health and human services shall require as a condition to granting old age assistance, aid to the permanently and totally disabled, or aid to the needy blind in any case that the applicant, and the spouse of the applicant, if any, residing with the applicant, submit a properly acknowledged agreement to reimburse the federal government, the state and the county for all assistance granted. In such agreement such applicant, and the spouse of the applicant, if any, shall assign as collateral security for such assistance such part of his or her personal property as the commissioner of health and human services shall demand. All funds recovered under the provisions of this section and N.H. Rev. Stat. § 167:27, after any necessary reimbursement to the federal government as provided in N.H. Rev. Stat. § 167:13, shall be allocated to the county and to the state in the same proportion as the assistance paid by each.