Any member of the Fire or Police Department who shall have served in such department for 20 years or more in the aggregate in any capacity or rank whatever, on his request, or by order of the Board, if it be deemed for the good of the department, shall be retired from further service in such department, and such member shall thereafter, during his lifetime, be paid in equal monthly installments a pension as follows:
(a) Twenty Years Service: For 20 years aggregate service, 40% of the average monthly rate of salary assigned to the ranks or positions held by the member during the three years immediately preceding the date of his retirement;
(b) Twenty up to Twenty-Five Years Service: And an additional 2% of the average rate of salary for each year over 20 and less than 25 years in the aggregate served by the member before retirement;
(c) Twenty-Five Years Service: For 25 years aggregate service, 50% of the average monthly rate of salary assigned to the ranks or positions held by the member during the three years immediately preceding the date of his retirement;
(d) Twenty-Five up to Thirty-Five Years Service: And an additional 1 2/3% of the average rate of salary for each year over 25 and less than 35 years in the aggregate served by the member before retirement;
(e) Thirty-Five or More Years Service: For 35 years or more aggregate service, two-thirds of the average monthly rate of salary assigned to the ranks or positions held by the member during the three years immediately preceding the date of his retirement.
(f) Hires Prior to January 17, 1927 with Thirty Years Service: Any member of the Fire or Police Department who shall have become a member of such department prior to January 17, 1927, who shall have served in such department for 30 years in the aggregate in any capacity or rank whatever, shall, on his request, or by order of the Board, if it be deemed for the good of the department, be retired from further service in such department, and he shall thereafter, during his lifetime, be paid in equal monthly installments a pension equal to two-thirds of the average monthly rate of salary assigned to the ranks or positions held by such member during the three years immediately preceding the date of his retirement.
(g) Hires Prior to January 17, 1927 with Twenty Years Service: After 20 years aggregate service, on request of a member who shall have become a member of such department prior to January 17, 1927, or by the Board for the good of the department, such member shall be retired and paid in equal monthly installments a limited pension as follows:
(1) Twenty Years Service. For 20 years aggregate service, 50% of the average monthly rate of salary assigned to the ranks or positions held by the member during the three years immediately preceding the date of his retirement;
(2) Twenty up to Thirty Years Service. An additional 1 2/3% of the average rate of salary for each year over 20 years and less than 30 years in the aggregate served by the member before retirement.
In computing the aggregate period of service of a member of the Fire or Police Department for the purposes of this section, there shall be included the period or periods of time, if any, while the member was on disability retirement pursuant to the provisions of Sections 1310 or 1312 relating to Service and Nonservice Connected Disability Pensions of this Charter.
The provisions of this section are subject to the further conditions set forth in Section 1308 relating to the Maximum Tier 1 Pensions of this Charter.