(a) As used in this section, the following terms have the following meanings, unless the context clearly indicates otherwise: "Accrual date" means the day an injured worker's income benefits begin to accrue. "Day of disability" means a day when the worker is unable to obtain and retain employment at wages equivalent to the pre-injury wage because of a compensable injury. Intermittent days of disability shall be cumulated to calculate the accrual date.(b) An injured worker's accrual date is the worker's eighth day of disability.(c) A carrier who has received written notice of an injury and has not disputed the claim shall initiate income benefits no later than the seventh day after the accrual date.(d) Nothing in this section is intended to limit a carrier's discretion to initiate payment of temporary income benefits before the time limit established in subsection (c) of this section.