Specified in 4.2.1.14 in [RFC 5280]:
4.2.1.14. Inhibit anyPolicy
The inhibit anyPolicy extension can be used in certificates issued to
CAs. The inhibit anyPolicy extension indicates that the special
anyPolicy OID, with the value { 2 5 29 32 0 }, is not considered an
explicit match for other certificate policies except when it appears
in an intermediate self-issued CA certificate. The value indicates
the number of additional non-self-issued certificates that may appear
in the path before anyPolicy is no longer permitted. For example, a
value of one indicates that anyPolicy may be processed in
certificates issued by the subject of this certificate, but not in
additional certificates in the path.
Conforming CAs MUST mark this extension as critical.
id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::= { id-ce 54 }
InhibitAnyPolicy ::= SkipCerts
SkipCerts ::= INTEGER (0..MAX)