Proposed resolution:

This wording is relative to SG3 working draft and assumes that LWG 1450 has been resolved.

1. Change [enum.copy_options] as indicated:

   This enumerationThe enum class type copy_options is a bitmask type (C++11 §17.5.2.1.3) that specifies bitmask constants used to control the semantics of copy operations. The constants are specified in option groups. […]

2. Change [enum.perms] as indicated:

   This enumerationThe enum class type perms is a bitmask type (C++11 §17.5.2.1.3) that specifies bitmask constants used to identify file permissions.