1. (a) the posting of a notice in a conspicuous place in the branch which is planned to be closed, and leaving such notice in such branch for at least 90 days; and
2. (b) the inserting of a single notice in the periodic account statement ordinarily mailed to each person who maintains a banking relationship with such banking organization at the branch which is planned to be closed.

Every banking organization shall give notice to its customers of the planned closing of a branch not less than 90 nor more than 180 days prior to the planned date of closing. Such notice shall be accomplished by: