The basic principle of Australian contract law is freedom of contract, under which parties are at liberty to strike whatever bargain they choose. A contract law attorney can help ensure that your business has specific and enforceable contracts that include necessary terms under Ohio law.A contract is an agreement made between 2 or more parties that is legally enforceable. A usage of trade applicable in the place in which part of the performance under the agreement is to occur may be so utilized as to that part of the performance. Choice of law clause, also known as a governing law clause, that allows the contract parties to choose the substantive law of Ohio to apply to the contract. When someone buys products or services, they enter into a contract with the seller. This book was written to help fill the need for a survey of law for the non-lawyer. Choice of law clause, also known as a governing law clause, that allows the contract parties to choose the substantive law of Ohio to apply to the contract.