In determining the burden, if any, of a State or political subdivision standard or requirement on interstate commerce the Commission shall consider and make appropriate (as determined by the Commission in its discretion) findings on the technological and economic feasibility of complying with such standard or requirement, the cost of complying with such standard or requirement, the geographic distribution of the household substance to which the standard or requirement would apply, the probability of other States or political subdivisions applying for an exemption under this subsection for a similar standard or requirement, and the need for a national, uniform standard or requirement under this Act for such household substance.