In order to provide online training, the Maintenance Training Organisation must develop in its Mtoe a procedure that is acceptable to the authority. This Mtoe must be approved prior to providing the training and the online training procedure must be developed in accordance with the AESA Part 147 Online Training Guide.

On the AESA website:
https://www.seguridadaerea.gob.es/Organisations/Training Organisations/Maintenance Training Organisations (Part 147)

Information on the approval procedure can be found in the Applicant Information Guide FOR-P147-P01-GU01.

Technical requirements on the Organisation Manual can be found in the FOR-P147-P01-DT01 guide.

There is no limitation in the standard or in the EASA guides that prevent a certifier from performing critical tasks in its first year.  
However, the organisation may add additional requirements in its maintenance organisation manual.

A B1 can perform transponder check tasks, as long as: 

• Use automated testing equipment (which does not require previous calibrations)
• Test results are GO/NO GO 
• Be trained in the use of such equipment.

The evaluation for approval of a Maintenance Technician Training Organisation Part 147 has no fee