(a) Upon written application by a member, the credit committee or loan officer may approve a line of credit, and loan advances may be granted to the member within the limit of such line of credit. Access to the line of credit may be by use of a lender credit card. Where a line has been approved, no additional credit application is required as long as the aggregate indebtedness does not exceed the approved limit.
(b) Lines of credit shall be subject to periodic review by the credit union, in accordance with the written policies of the credit union's board of directors, and approved or disapproved as to the granting of further loan advances.