Not my market, but I keyed trucking invoices in Johannesburg before I moved into compliance, so this one I know from the admin chair. Our diesel price is adjusted once a month, on the first Wednesday, so a surcharge clause only has to name a month. The contracts on my desk read the loading date. Even then, any load that sat over a changeover started an email war, and ours goes up hard this Wednesday.
With a weekly print I would want to see the clause first: does yours actually name the day, or does each side quote whichever Monday suits them?
