An amendment to notice of claim of lien presented for filing and recording must:
(a) Be signed by or on behalf of each original claimant or last assignee of record; and
(b) Recite the nature of the change being effected by the instrument. [CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by USCG-2014-0688, 79 FR 58281, Sept. 29, 2014; USCG-2014-0688, 79 FR 61262, Oct. 10, 2014]