| (a) | - | commencing on the 1st day of April, 1952, and ending with the date of the commencement of the Minimum Wages (Amendment) Act, 1954 (6 of 1954); or |
| (b) | - | commencing on the 31st day of December, 1954, and ending with the date of the commencement of the Minimum Wages (Amendment) Act, 1957 (30 of 1957); or |
| (c) | - | commencing on the 31st day of December, 1959, and ending with the date of the commencement of the Minimum Wages (Amendment) Act, 1961, |