Final answer:
The reinstatement of Allison's policy is an example of an exception to the policy cancellation rules, reflecting a likely reliance on the legal principle of estoppel due to the insurer's history of accepting late payments.
Step-by-step explanation:
The decision to reinstate Allison's policy after paying her premium on the 16th for 5 years and then being cancelled for nonpayment by a new CEO can be seen as an example of an exception to the policy cancellation rules. Given that the insurance company had consistently accepted the late payment without prior issues, Allison might have established a precedent or an implied agreement for the acceptance of her payment terms. This situation does not reflect a change in the insurer's overall policy, nor a specific legal requirement to reinstate, and although it could be seen as a negotiation, the available information does not specify any negotiation took place. Instead, it appears that Allison's legal challenge to the cancellation likely relied on the principle of estoppel, which prevents a party from going back on a previously accepted arrangement.