I am re-posting this message from Pavel, CO7WT about the Cuban ´s permit on 60m band.
"Hi from CO7WT, Pavel in Camagüey, Cuba.
The Official Cuba segment in 60m is this:
5418 to 5430 Khz
In the following site (see link) you can find the original document that allows cuban's too use 60m band, I was active a time ago as the first Cuban ham in the band I was the first experimental license for 60m (Authorities call it 55m here).
I suggest 5425 Khz USB as main freq in Cuba, I have tried regular contacts with cuban's and others in this freq with success and no interference, just one time on the air I get required on the air to QRT by a primary user of the frequency.
If you plan to work split, be sure to listen from time to time on the TX freq, remember you are a secondary user.
73 de Pavel, CO7WT"
Pavel posted it to 60m Yahoo group list and suggested the QRG for planned DX-pedition from Cuba. It is useful to understand the system of approval on 60m for Cuba and remember it if you will be looking for CO on this band.
73 - Petr, OK1RP