(1) A subpoena remains in force until the earliest of the following events:

(a)

the subpoena is complied with;

(b)

the issuing party or the court releases the named person from the obligation to comply with the subpoena;

(c)

the hearing or trial is concluded.

(2)

For paragraph (1) (c), a trial or hearing is concluded when all parties have finished presenting their case.