RFC 3977, "Network News Transfer Protocol (NNTP)", October 2006

Errata ID: 1930
Status: Verified
Type: Editorial
Publication Format(s) : TEXT
Reported By: Julien Élie
Date Reported: 2009-10-24
Verifier Name: Lisa Dusseault
Date Verified: 2009-11-03

Section 7.6.1.2 says:

If the keyword is not recognised, or if an argument is specified and
the keyword does not expect one, a 501 response code MUST BE
returned.  If the keyword is recognised but the server does not
maintain the information, a 503 response code MUST BE returned.

It should say:

If the keyword is not recognised, or if an argument is specified and
the keyword does not expect one, a 501 response code MUST be
returned.  If the keyword is recognised but the server does not
maintain the information, a 503 response code MUST be returned.

Notes:

So as to be homogeneous with the rest of the document, lower-case letters should be used for the verb after "MUST".

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