The ship's master should obtain from the operator of the
reception facilities, which includes barges and tank trucks, a receipt
or certificate detailing the quantity of tank washings, dirty ballast,
residues or oily mixtures transferred, together with the time and
date of the transfer. This receipt or certificate, if attached to
the Oil Record Book Part I, may aid the master of the ship in proving
that the ship was not involved in an alleged pollution incident. The
receipt or certificate should be kept together with the Oil Record
Book Part I.