Due to a limitation of characters, I was unable to post the requirements. However you may go to the website below and review the most up to date CFR.

https://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&sid=40760189a03dfea0b501608f33820a45&rgn=div5&view=text&node=14:2.0.1.1.2&idno=14#sp14.2.61.i