Every employer who has secured the payment of compensation as
required by 33 U.S.C. 932 and by the regulations in this part may
request a certificate from the district director in the compensation
district in which he has operations, and for which a certificate is
required by 33 U.S.C. 937, showing that such employer has secured the
payment of compensation. Only one such certificate will be issued to an
employer in a compensation district, and it will be valid only during
the period for which such employer has secured such payment. An employer
so desiring may have photocopies of such a certificate made for use in
different places within the compensation district. Two forms of such
certificates have been provided by the Office, one form for use where
the employer has obtained insurance generally under these regulations,
and one for use where the employer has been authorized as a self-
insurer.