Section 342.1 - Definition of words and terms used in this part(a)Payroll savings plan refers to a voluntary program maintained by an employer whereby its participating officers and employees authorize regular withholdings from their salaries or wages for the purchase of savings bonds.(b)Quarter refers to a 3-month period of a year, as follows: January-February-March, April-May-June, July-August-September, or October-November-December.