It looks like if you have a C.G. license, and you wish to retain your license regardless of what or where you boat, a person will need to get the Transportation Workers Identification Card by Sept. The process sounds painless. More info-
http://www.tsa.gov/what_we_do/layers/tw ... _faqs.shtm
http://www.tsa.gov/what_we_do/layers/tw ... _faqs.shtm