In addition to the events in §67.167(c)(1) through (c)(9) of this chapter, a Certificate of Documentation together with a coastwise endorsement under this subpart becomes invalid when—

(a) The owner fails to make the certification required by §68.65 or ceases to meet the requirements of the certification on file;

(b) The demise charter expires or is transferred to another charterer; or

(c) The citizenship of the charterer or sub-charterer changes to the extent that they are no longer qualified for a coastwise endorsement.