RSA 100-A:6 Disability Retirement Benefits.

I. Group I Members.
(a) Upon the application of a group I member in service or of his employer, any such member who has 10 or more years of creditable service may be retired by the board of trustees on an ordinary disability retirement allowance, not less than 30 nor more than 90 days subsequent to the filing of such application; provided that a physician or physicians designated by the board of trustees, after a medical examination of such member, shall certify, and the board shall find, that he is mentally or physically incapacitated for the further performance of duty, that such incapacity is likely to be permanent and that he should be retired.
(b)(1) Upon ordinary disability retirement, the group I member who has attained age 60 shall receive an ordinary disability