
Currently, Bangkok Metropolitan Administration (BMA) is scheduled to deliver Bt790million to an Austrian supplier as partial payment for fire vehicles on February 11.
"We hope OAG will provide the guideline for BMA to follow before that due date comes," Thaworn said after a meeting with BMA officials.
The Bt790million amount is the fifth instalment of the controversial Bt6.6billion deal, which saw many high-profile figures implicated in dubious practice.
Last year, the National Anti-Corruption Commission (NCCC) suggested that Samak Sundaravej, Bhokin Bhalakula, Apirak Kosayodhin and many more officials be prosecuted for the deal that cost huge damage to Thailand.
The Austrian supplier was found to overcharge on all the vehicles provided under the deal, which first stemmed from an Agreement of Understanding.
Bhokin was then an interior minister who signed the agreement. Samak, then caretaker Bangkok governor, signed the purchase contract. Apirak later opened the letter of credit for the deal.
So far, public prosecutors have yet to take action against anyone, citing that more information is needed from the anti-graft agency.
Thaworn yesterday said NACC clearly failed to include the conclusion from an investigation panel headed by Prasert Boonsri.
The panel has found Apirak not guilty on grounds that Apirak tried to stop the deal several times but was required to open the Letter of Credit by the purchase agreement.
Apirak and Thaworn are both members of the Democrats.
"I want relevant authorities to give justice to Apirak," Thaworn said, "I also hope all accused persons will receive justice".