Spanish AIP regarding casual heliports:
3.7. Casual heliports
Casual heliports are surfaces that have the minima safety conditions to be used by helicopters on a temporary basis.
The utilization of these fields are subject to the authorization of the terrain owner and the Agencia Estatal de Seguridad Aérea and limited to a maximum of three landing and
take-off operations a month, except for aircraft in special operations.
Link:
AD - Aeródromos - ENAIRE - Navegación Aérea
PM me if you'd like further information
Cheers Jonny