Paramount clause. (Also termed Clause Paramount.) This clause is generally found in a bill of lading but can also be found in a charterparty.
Pro rata freight. Without express or implied agreement, full freight is payable only on delivery of the cargo. If the ship and/or the cargo is lost freight does not become payable. However, a clause in a charterparty may provide for part (or all) of the freight to be prepaid. This is one use of the phrase "prorata freight".
Port formalities and laytime. When a ship "arrives" at the contractual destination before it can be actually ready and before the Notice of Readiness is given and accepted, thus triggering the commencement of the laytime, it must be physically and legally ready. One aspect of legal readiness is related to compliance with all port formalities.