(a) In any case not coming within Section 6147 in which it is reasonably foreseeable that total expense to a client, including attorney fees, will exceed one thousand dollars ($1,000), the contract for services in the case shall be in writing. At the time the contract is entered into, the attorney shall provide a duplicate copy of the contract signed by both the attorney and the client, or the client’s guardian or representative, to the client or to the client’s guardian or representative. The written contract shall contain all of the following:

1. (1) Any basis of compensation including, but not limited to, hourly rates, statutory fees or flat fees, and other standard rates, fees, and charges applicable to the case.
2. (2) The general nature of the legal services to be provided to the client.
3. (3) The respective responsibilities of the attorney and the client as to the performance of the contract.

(d) This section shall not apply to any of the following:

1. (1) Services rendered in an emergency to avoid foreseeable prejudice to the rights or interests of the client or where a writing is otherwise impractical.
2. (2) An arrangement as to the fee implied by the fact that the attorney’s services are of the same general kind as previously rendered to and paid for by the client.
3. (3) If the client knowingly states in writing, after full disclosure of this section, that a writing concerning fees is not required.
4. (4) If the client is a corporation.