AESA does not send acknowledgement of receipt when it receives the declaratory renewal of the Restricted Airworthiness Certificate, however, it reserves the right to notify if it detects any irregularity in the completion of the declaratory certificate.

If you do not have a digital certificateor Cl@ve , it can also be sent by registered post or through the other formal channels of the Administration to the following address: Paseo de la Castellana 112. 28046 Madrid, addressed to the Initial Air Navigation Division.

Below are two useful links regarding applicable regulations, guides and information needed for DOA processes:

You must apply for an experimental airworthiness certificate (please note that you will not subsequently be able to market the prototype or other identical units without a type-certificate): 

https://sede.seguridadaerea.gob.es/sede-aesa/catalogo-de-procedimientos/certificado-de-aeronavegabilidad-experimental-no-easa

There is no type-certificate validation. To obtain the Spanish type certificate it is necessary to comply with Spanish regulations through a certification process available on the AESA website: https://sede.seguridadaerea.gob.es/sede-aesa/catalogo-de-procedimientos/certificación-de-tipo-ulm

Yes, you can. If not included, the certification process of the model in question should be initiated to include it in the Spanish type-certificate.

All aircraft must comply with the obligations laid down in Law 48/1960 on Air Navigation. Article 151 provides for the following derogation: Aircraft with limited uses, technical characteristics and actions may be exempted, under the conditions laid down by regulation, from the requirements for entry in the Register of Aircraft and obtaining the certificate of airworthiness referred to in Articles 29 and 36 of this Law respectively.

No. In Spain the weight limit for a ULM, in accordance with Article 1 of Royal Decree 2876/1982, is 450 kg. 

Oh, yeah, yeah. The opening of new facilities would be subject to the same approval as the Spanish POA. Only EASA would be required to intervene in this case. It would be a significant change through the addition of a new factory, in which it would be necessary to revisit all the points of the standard, especially those relating to the quality system, as well as to see how this new factory is integrated into the Organisation ' s activity in order to verify its suitability.