General rule.
General rule. For the purpose of determining the hours of service which must be credited to an employee for a computation period, a plan shall determine hours of service from records of hours worked and hours for which payment is made or due or shall use an equivalency permitted under paragraph (d), (e) or (f) of this section to determine hours of service. Any records may be used to determine hours of service to be credited to employees under a plan, even though such records are maintained for other purposes, provided that they accurately reflect the actual number of hours of service with which an employee is required to be credited under 2530.200b2(a). Payroll records, for example, may provide sufficiently accurate data to serve as a basis for determining hours of service. If, however, existing records do not accurately reflect the actual number of hours of service with which an employee is entitled to be credited, a plan must either develop and maintain adequate records or use one of the permitted equivalencies. A plan may in any case credit hours of service under any method which results in the crediting of no less than the actual number of hours of service required to be credited under 2530.200b2(a) to each employee in a computation period, even though such method may result in the crediting of hours of service in excess of the number of hours required to be credited under 2530.200b2. A plan is not required to prescribe in its documents which records are to be used to determine hours of service.