A person required to file a statement of economic interests under this chapter shall file an updated statement for the previous calendar year with the appropriate supervisory office annually, no later than April fifteenth of each calendar year, listing any addition, deletion, or change in his economic status with respect to which information is required to be supplied under this article. If the person has filed the description by name, amount, and schedule of payments of a continuing arrangement relating to an item required to be reported under this article, an updating statement need not be filed for each payment under the continuing arrangement, but only if the arrangement is terminated or altered.