(1) In this Part, "arbitration agreement" means an agreement by the parties to submit to arbitration all or certain disputes which have arisen or which may arise between them in respect of a defined legal relationship, whether contractual or not.
     (2) An arbitration agreement may be in the form of an arbitration clause in a contract or in the form of a separate agreement.
     (3) An arbitration agreement shall be in writing.
     (4) An arbitration agreement is in writing if it is contained in
         (a) a document signed by the parties;
         (b) an exchange of letters, telex, telegrams or other means of telecommunication ¹[including communication through electronic means] which provide a record of the agreement; or
         (c) an exchange of statements of claim and defence in which the existence of the agreement is alleged by one party and not denied by the other.
     (5) The reference in a contract to a document containing an arbitration clause constitutes an arbitration agreement if the contract is in writing and the reference is such as to make that arbitration clause part of the contract.