The standard does not impose a "basic" or "generic" maintenance program; however, Chapter 1.2 of the CAME should describe how the organisation will develop the AMP. 
The organization must define the means to demonstrate that they are competent for the management that is intended to be carried out. Certain elements, such as the IT tool to manage the AMP, access to applicable technical documentation and/or staff experience in AMP matters, can contribute to achieving this objective.

In principle, to maintain the privilege as a PRA in a CAMO Y, the experience demonstrated by performing work on a CAMO X will also be considered valid.

Yes, an organization with Part CAMO approval may have a generic scope on its approval certificate (AC-CAMO-P01-F14). However, even if the organisation approval has a generic scope, the continuing airworthiness management exposition (CAME) shall always reflect the specific scope of the organisation; It is therefore recommended that the generic scope of approval should not be excessively broad compared to the scope defined in the CAME.  
Organisations shall request from AESA any change to the scope defined in the approval certificate.

There must be an agreement between the auditor and the auditee that includes:

This applies both to remote audits carried out by the competent authority and to audits carried out by organisations on their own suppliers and subcontractors.  
Authorities/organisations that decide to use remote audits should describe the functioning of remote audits in their procedures and should consider at least the following points:

It is considered subcontracting if it manages the information, the duplication of information, or similar. It would not be subcontracting, if only the rental of equipment or space to store them were contracted, and the control and management of information was the responsibility of CAMO.

No, maintenance and airworthiness shall be carried out in national centres approved by EASA.

Yes, but only for aircraft included in TAE.AER.GEN.300.  
For the rest of the aircraft included in TAE.AER.GEN.100 and TAE.AER.GEN.200, maintenance must be performed in organizations with EASA certificate (Part 145 or Part CAO).

According to paragraph 3 of point M.1 of Annex I (Part-M) to Regulation 1321/2014: 

• An Application for Certificate of Recognition must be completed in accordance with the FOR-66EE-P01-F01 format, which can be found in the catalogue of procedures and services of the AESA Electronic Headquarters under the name "AESA Certificates of Recognition on LMA Part-66 examinations", in the "Licences and Aeromedicine" section: