There shall be in the department, assigned to the commissioner’s office, a full-time, classified employee with the title of claim representative. He shall be qualified as a certifying officer and possess such other requisite skills, knowledge and abilities as appropriate. His duties shall include advice to claimants relative to presentation of their best case to a certifying officer for purpose of redetermination, and the presentation of, or assistance therein, a claimant’s case before an appeal tribunal including request for reopening. There shall also be in the department, but not members of the state classified service, part-time assistant claim representatives who shall be knowledgeable about unemployment compensation, shall be appointed by and serve at the pleasure of the commissioner, receive $40 for each day or any part thereof that they perform services at the request of the commissioner or his authorized representative, and, when necessary to the performance of their duties as determined by the commissioner, shall be reimbursed for mileage and meals as are state employees generally. The assistant claim representative shall assist the claim representative and shall work under his general supervision to the extent deemed appropriate by the commissioner. Neither appointment under N.H. Rev. Stat. § 282-A:53-58 and N.H. Rev. Stat. § 282-A:128-131 nor receipt of retirement or pension payments from the state shall bar appointment and remuneration as an assistant claim representative. No claimant shall be a beneficiary of this provision, except for preliminary evaluation, unless the commissioner or the claim representative finds the case to be one about which reasonable men may disagree.