i want to Customize 2 Articulate Storyline courses to include a timing functionality

Customize 2 Articulate Storyline courses to include a timing functionality. We are a course provider for the CA government and they are requiring proof that a student spends a minimum time in each course before completing the course and obtaining certificate. The student would need to be able to stop and resume taking the course at any time and the total time taking the course not be affected. When they reach the end of the course, if the time requirement is not finished, they must go back and retake some lessons to complete their time requirement. This probably will involve some custom programming. Please only apply if you know exactly how to do this.