The Pe­tro­le­um Deal­ers As­so­ci­a­tion (PDA) has writ­ten State-owned fu­el dis­trib­u­tor, Na­tion­al Pe­tro­le­um Mar­ket­ing Com­pa­ny Lim­it­ed (NP), seek­ing a 30-day cred­it in light of the ...