In an extraordinary situation, when justice requires and no other party is injured thereby, any requirement of the rules in parts 2, 3, 6, and 7 of this chapter that is not a requirement of the Act may be suspended or waived by the Director.
37 C.F.R. §2.148
Part 3 pertaining to both patents and trademarks is placed in the grouping pertaining to patents regulations.
Part 4 is placed in the separate grouping of parts pertaining to patents regulations.
Part 5 is placed in the separate grouping of parts pertaining to patents regulations.