Commission employees have a specific ROE rule. Service Canada’s ROE Guide explains that for employees whose earnings consist mainly of commissions, an interruption of earnings occurs only when the employment contract is terminated—unless the employee stops working due to specified EI-related reasons such as illness/injury/quarantine, maternity/pregnancy, parental leave, or compassionate care/family caregiver leaves.

This means the usual 7-day rule (7 consecutive days with no work and no insurable earnings) generally does not trigger an interruption of earnings for mainly-commission employees as long as the contract continues. In other words, if the employee stops working for reasons like vacation or a leave of absence but remains under contract, Service Canada indicates there is no interruption of earnings and therefore no ROE is issued just because of time without commissions/work.

So the correct choice is when the employment relationship/contract is terminated (option C).