What is the best process for applying assignment rules?

Hi there, can I please ask for thoughts and feedback on the following scenario, any suggestions welcome. I feel there should be a better way to achieve this. At present, this is what I have discovered.

Scenario: Learner needs to be assigned eLearning that needs to be renewed every three years.

Steps taken:

1. Course is created and the following 'Default assignment rules' are added:
   1. Initial assignment status - 'Active'
   2. Validity period starts - 'After completion'
   3. Validity period expires - ' Expires in years' - Valid for 'Three years'
   4. Renewal options - 'Start next renewal before validity of prior assignment ends'