What does it mean when an MPEP section is marked as [Reserved]?
When an MPEP section is marked as [Reserved], it indicates that the section number exists but there is currently no content provided for that section. The MPEP states in section 212:
212 [Reserved] [R-]
Topics:
MPEP 200 - Types and Status of Application; Benefit and Priority Claims,
MPEP 212 - [Reserved],
Patent Law,
Patent Procedure