NBOs and individual players are responsible for checking with their own government / travel agency to see if a visa is required to visit Morocco. They should apply for a tourist visa, not a business visa. 

Very few countries appear to require visas but it is up to each person to confirm that for their own country. 

Certainly all passports, whether a visa is required or not, must be valid for at least 6 months after the date of departure from Morocco.

If an invitation is required then please email Anna Gudge with your name as it appears on your passport and she will send you an invitation. If your application requires more detail to be shown in the invitation, please include that in the email.