These are the laws that rule the issue of renting out ´viviendas turisticas´:
and
Please note that although since the introduction of the law on Viviendas Vacacionales in 2015 renting out property for holiday purposes is now legal, the restrictions and requisites are thus, that in practice it is extremely difficult to comply.
Contrary to for example the Holiday Rental Law in Andalucia, you cannot start renting out your property as soon as you´ve filed the ´declaración responsable´ with the authorities, but you must wait till you receive notification (estimated 15 days). Until then, you can be sanctioned if you advertise or rent out your property.
More information, in Spanish, on a blog from a Spanish lawyer who specializes in this field.
And an active Association for home owners that want to rent out their property for holiday purposes. Several articles of the original regulation from 2015 have been annulled by the courts in 2017 and several others still pending.
Info from Tenerife authorities /Cabildo re the filing of a ´declaración responsable´ for vivienda vacacional.
And from Lanzarote.
Fuerteventura ´declaración responsable. and Cabildo website.