(ii) Three years back from the date payment was issued if the error was based on any issue other than rates paid by age or region; and
(iii) Three years back from the date the payment was issued for any underpayment identified by a federal or state audit.
(b) For overpayments:
(i) Two years back from the date payment was issued if the error was based on rates paid by age or region, except as provided in (b)(iii) of this subsection; and DCYF must notify the provider of the overpayment by personal service or by certified mail, return receipt requested, within two years of the date the payment was issued; or
(ii) Three years back from the date payment was issued if the error was based on any issue other than rates paid by age or region; DSHS or DCYF must notify the provider of the overpayment by personal service or by certified mail, return receipt requested, within three years of the date the payment was issued; and
(iii) Three years back from the date the payment was issued for any overpayment identified by a federal or state audit; DCYF must notify the provider of the overpayment by personal service or by certified mail, return receipt requested, within three years of the date the payment was issued.
(4) For in-home/relative and family home child care providers, disputes regarding underpayments may be addressed through the grievance process provided for in the collective bargaining agreement.