English to Polish Bus/Financial Law: Contract(s)

Any lead times quoted by XXX shall run from XXX's acceptance of the Buyer’s order and/or on XXX's receipt of all necessary information to enable XXX to commence work under the Contract, whichever is later, and shall be subject to continued and timely ***performance from the Buyer.*** - czy chodzi tu o wymagalność? Czy raczej o aktualizację lub weryfikację terminów realizacji?