Section 350(b) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(b)(i)biennial training of one month; or(ii)where Naval ships are able to provide training on Sundays, holidays or part of a day for the benefit of those residing in the vicinity, biennial training of 30 days may be given in broken periods provided at least 2 weeks training is given in a continuous spell. When a full day's training is not undergone, every six hours of training shall for all purposes be counted as one day.