All goods in class 33 can not be registered. It gives protection to all the goods in addition to the specified goods. Yes there are joint applications in Libya, and requirements are same as for one applicant. Yes, an application can be filed without its complete documents, and the documents should be submitted within three months of the filing date. No, there are no multi-class applications in Libya.
Every class is filed in a separate application.
The Libyan authorities are not concerned with claiming priorities. The term of protection of a trademark is ten years calculated from the filing date and renewable for consecutive periods of ten years each. Yes he can within the grace period, which is three months. A Legalized and signed power of attorney. Use is required for maintaining the registration in force.