456.1. If a pumping unit is used to load water-based explosives, it must(1) be used in compliance with the safety rules set out in the Guidelines for the Pumping of Water-Based Explosives, published by the Department of Natural Resources of Canada, Explosives Regulatory Division, 30 November 1998 Edition;
(2) be clearly identified by red signs posted on all 4 sides of the unit with the word “EXPLOSIFS” written in white letters at least 102 mm (4.0 in) high; and
(3) be brought to the loading site at the required time for the loading operation and returned to the storage site or magazine in compliance with the provisions of sections 415.1 and 415.2 as soon as the loading is completed.