Termination:
a. expiration of term (or rzbl time)
b. purpose of agency complete
c. condition fulfilled
d. mutual consent of Pr/A
e. revocation/renunciation by Pr
f. death, bankruptcy, adjudication of incompetency by Pr or A
g. destruction of s.m. of agency or other change in cirx that would allow A to rzbly infer Pr no longer consents to his exercising authority
h. note:  you don’t have to terminate ratification; it’s occurrence-by-occurrence