What requirements are there for part-time employees that have other jobs also? Do I have to pay them the part-time wages during the down time with the PPP loan?

That is your discretion. If you want forgiveness for your PPP loan, you will be forgiven to the extent that you keep your total payroll and full time headcount as compared to monthly average of 2019. And you have to use 60% of your award on payroll to get forgivelness. Whatever is not forgiven will be loaned to you at 1% for a term of two years.