The question relates to the grace period of health insurance premium payments, which typically spans 30 days from the original due date unless the specific policy states otherwise.
The subject of the question pertains to a business-related scenario, specifically dealing with the payment and grace period of a health insurance premium. The grace period for insurance payments varies by policy, but it is typically a set duration of time after the due date during which payment can be made without penalty. If Samuel Johnson's health insurance policy has a standard grace period, it is commonly 30 days from April 1. However, without explicit information from the policy, we cannot provide the exact expiration date of the grace period.