16 U.S. Code § 4012 - Assessments
A council shall impose and administer the collection of the assessments that are necessary to pay for all expenses incurred by the council in carrying out its functions under this chapter.
A council may not impose an assessment on any person that was not eligible to vote in the referendum establishing the council under section 4009(e) of this title by reason of failure to meet the requirements specified under section 4009(b)(6) of this title, unless such person, after the date on which such referendum is held, meets the requirements of section 4009(b)(6) of this title.
Any person may make voluntary payments or in-kind contributions to a council for purposes of assisting the council in carrying out its functions.
All funds collected or received by a council under this section shall be deposited by the council in an appropriate account in the name of the council specified in its charter. Funds eligible to be collected or received by a council shall be limited to those authorized under this section.