Continuing Benefits During Extended Illness. Subject to the regulations of the insurers, the conditions outlined in Clauses 21.03 and 21.08, and the receipt of a letter of understanding from the employee involved, the Employer agrees, during the extended illness, to pay one hundred percent (100%) of the premiums. Upon return to work or termination, the employee shall reimburse the Employer twenty percent (20%) of the premiums paid for Group Life Insurance and thirty percent (30%) of the premiums paid for Dental Plan except for Medical Services Plan and Extended Health Benefit Plan premiums.