18 CFR 385.1402: Subscriber lists (Rule 1402).

(a) Not later than December 31 of each year, an oil pipeline must request, in writing, each of its subscribers and each person who has been served under any of its tariffs during the preceding twelve months to notify the pipeline as to whether the subscriber or person wishes to be included on the subscriber list for any of the oil pipeline's integrated pipeline systems.

(b) The oil pipeline must immediately add to the specified subscriber list any subscriber or person which responds in writing within 30 days of receipt of the oil pipeline request and which indicates in that response that it wishes to be included on the specified list.