Chronic health problems such as cardiovascular disease, diabetes, obesity, cancer and kidney disease account for more than 75% of the nation's $2.7 trillion in annual spending for medical care, says Ursula Bauer of the Centers for Disease Control and Prevention.
He might need to have one while waiting for a TS clearance to go thru. They take from 1-4 months for the interim, the TS clearance could take from 1 month to 2 years from what I have seen. I had to wait 2 years for the final one to go thru. As I said I have also seen people get them really fast too.
Recommended interval: 6 months or 6,000 miles. The Interim Service is designed for the high mileage car user, or vehicles which require frequent checks. We test all the main moving parts that may need attention over a short period of time. The interim service should be performed at 6 month intervals between annual services.