30 days from when? I remember once attending a tender qualification meeting to a drainage contract I had supposedly won, and these were the payment conditions. Firstly I was supplying all the materials, stone, 450mm pipe, manholes, tream, etc.
So no invoice for the first 30 days, invoice only on sign of a remeasure, then payment on 60 days from receipt of invoice at head office.
actual
Work the first month, wait a month for the sign off, then at least 2 weeks for the remeasure. Submit invoice to site for payment. Two weeks later it arrived at head office.
Standard return to site for clarification, two weeks return to payment office, stamped as received then 60 days form date of stamp............................ so basically it was 5-6 months for payment ........................................... oooh! and this was a state job given to a main contractor a I was constantly being told in the meeting that my money was guaranteed,
Left the meeting and the contract unsigned on the table....................................the contractor that took on the job got badly burned................... when the main contractor got in to difficulties and was taken over by a supplier company they owed a lot of money to.