45Α.-(1) Subject to the provisions of subsection (2) of this section any teacher eligible for a penson as provided in section 45-
(a) who retires in the circumstances described in paragraph (b) of sub-section (1) of section 49 of this Law; and
(b) who at the date of his retirement has completed more than ten years but less than twenty years service,
may be granted an additional pension at the rate of one six-hundredth of his salary for each month by which his service falls short of twenty years or by which his age at such date falls short of sixty years whichever is less.
(2) The provisions of sub-section (1) of this section shall not apply in the case of a teacher-
(a) who is permanently injured and entitled to benefits under the Workmen’s Compensation Law; or
(b) who is permanently injured and eligible to receive an additional pension under the provisions of section 53 of this Law:
Provided that if the pension for which such teacher is eligible under the provisions of the said section 53 is less than the additional pension for which he would otherwise be eligible under the provisions of this section, such teacher may be granted an additional pension under this section in lieu of an additional pension under the provisions of section 53 of this Law.