Within sixty (60) days from the initial filing, sensitivity analyses of the original filing using reasonable alternative assumptions may be proposed by parties and intervenors to any docket instituted to examine the utility's filing. The utility shall undertake to perform these analyses following a reasonable opportunity to object or to suggest changes to the parties' proposals. This time limit may be extended on a showing of undue hardship.
65- 407 C.M.R. ch. 332, § 7