Library /sys$common/syshlp/uafhelp.hlb ADD, Qualifiers, /PWDMINIMUM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PWDMINIMUM=value

    Specifies the minimum password length in characters. Note that
    this value is enforced only by the DCL command SET PASSWORD. It
    does not prevent you from entering a password shorter than the
    minimum length when you use AUTHORIZE to create or modify an
    account. By default, a password must have at least 6 characters.
    The value specified by the /PWDMINIMUM qualifier conflicts with
    the value used by the /GENERATE_PASSWORD qualifier or the DCL
    command SET PASSWORD/GENERATE, the operating system chooses the
    lesser value. The maximum value for generated passwords is 10.