64. (1) The Government may, by notification in the official Gazette, make rules to give effect to the provisions of this Ordinance. (2) In particular, and without prejudice to the generality of the foregoing power, such rules may provide for all or any of the following matters, namely-(a) supplementary, derived, special or other units of weight or measure, standard symbols or definitions, as recommended by the General Conference on Weights and Measures or the International Organisation of Legal Metrology;(b) multiples and sub multiples of, and physical constants, ratios or coefficients in relation to units of weight or measure, as recommended by the General Conference on Weights and Measures or the International Organisation of Legal Metrology;(c) denominations of decimal multiples and sub multiples of numerals and the manner in which they shall be written;(d) periodical intervals at which the accuracy of the objects or equipment referred to in sections 7 and 8 shall be certified ;(e) the physical characteristics, configuration, constructional details, materials, equipment, performance, tolerances, methods or procedures of tests in relation to weights or measures;(f) the conditions, limitations and restrictions under which non standard weights or measures may be manufactured for export or may be exported;(g) class of goods or undertakings in relation to which, or class of users in relation to whom, no transaction, dealing or contract shall be made or had except by specified weight, measure or number;(h) the manner of declaration of the contents of a package and specification of the unit of weight, measure or number in accordance with which the retail sale price shall be declared on the package;(i) the standard quantities or number in which commodities may be packed;(j) the reasonable variations in the net contents of a packaged commodity which may be caused by the method of packing or ordinary exposure;(k) the classes of weights or measures which would fall in the first category or the second category;(l) the special seal by which weights or measures of the first category shall be stamped;(m) the form and manner in which and the time within which applications for inclusion of a name in the register of exporters and importers of weights and measures shall be made;(n) the period for which certificate of registration of an exporter or importer of weights or measures may be renewed;(o) the scales in accordance with which fees may be collected under section 63;(p) any other matter which is required to be, or may be, prescribed.