What are the registration requirements for registering a .GR domain?

.GR or .COM.GR:
There are no requirements for these extensions.

.ORG.GR:
In order to register a .ORG.GR domain, the domain owner must be a non-profit organization.

.NET.GR:
In order to register a .NET.GR domain, the owner must be an Internet Service Provider.

Note:
- The minimum registration period is 2 years.