(a) Any member who after the effective date of this article and during covered employment: (1) Has been or becomes either totally or partially disabled by injury, illness or disease; and (2) the disability is a result of an occupational risk or hazard inherent in or peculiar to the services required of members; or (3) the disability was incurred while performing law-enforcement functions during either scheduled work hours or at any other time; and (4) in the opinion of the board, the member is by reason of the disability unable to perform adequately the duties required of a deputy sheriff, is entitled to receive and shall be paid from the fund in monthly installments the compensation under either subsection (b) or (c) of this section.

(b) If the member is totally disabled, the member shall receive ninety percent of his or her average full monthly compensation for the twelve-month contributory period preceding the member's disability award, or the shorter period if the member has not worked twelve months.

(c) If the member is partially disabled, the member shall receive forty-five percent of his or her average full monthly compensation for the twelve-month contributory period preceding the member's disability award, or the shorter period if the member has not worked twelve months.

(d) If the member remains partially disabled until attaining sixty years of age, the member shall then receive the retirement benefit provided in sections eleven and twelve of this article.

(e) The disability benefit payments will begin the first day of the month following termination of employment and receipt of the disability retirement application by the Consolidated Public Retirement Board.