Edgartown wastewater commissioners outlined a new billing system this week aimed at ironing out accounting issues that led to a fraud investigation by the Cape and Islands district attorney earlier this year.

Tim Connelly, wastewater commissioner chairman, told the selectmen at their weekly meeting on Monday the changes recommended by the town’s independent auditor have been adopted. Changes include new accounting software, separation of billing and collection and a new system to measure waste deposited at the plant by private haulers.

The commission will receive a complete reconciled set of financial statements along with the manager’s written report on a monthly basis. And a new sign-out policy for bill warrants and payrolls requires at least two signatures — one from the facilities manager and one from a wastewater commissioner.

Selectman Margaret Serpa recommended the town’s auditor review the changes.

In March the town’s annual audit by an independent firm found severe discrepancies between reported receipts from the department and a hand-written ledger used by the private haulers. The audit also found faults in the system for the department’s billing and collection, which operated under the same management.

The auditor would not sign the final report for the town until the fraud investigation was complete, and without it, Edgartown’s bond rating could still be affected. The investigation remains ongoing. The auditor is expected to review the new plan next week.

In other business Monday, selectmen approved donating a 2005 Ford Crown Victoria from the Edgartown fire department to the Oak Bluffs police department for a new canine drug enforcement program.

Town administrator Pamela Dolby said having a drug-sniffing dog on the Island is more convenient and cost-effective than paying for a state police dog to come over to the Vineyard.

At their upcoming meeting on Monday the selectmen will hold a public hearing for nominating five historic paths for designation as special ways under a Martha’s Vineyard Commission district of critical planning concern (DCPC). Ben Tom’s Road, Middle Line Path, Pennywise Path, Tar Kiln Path and Watcha Path are being considered as part of the special ways zone of the Island Roads DCPC.

The roads were first nominated for inclusion in the DCPC in 2007, but the nomination was put on hold pending litigation.