Road Transport Planning Law: Road Transport Planning Law 16/1987 of 30 July (“LOTT”) - https://www.boe.es/buscar/act.php?id=BOE-A-1987-17803

Road Transport Planning Law Regulation: Royal Decree 1211/1990 of 28 September approving the Road Transport Planning Law Regulation (“ROTT”) - https://www.boe.es/buscar/doc.php?id=BOE-A-1990-24442

Passenger Road Transit Law: Passenger Road Transit Law 4/2004 of 18 March, published in Basque Country Official Journal Nº 60, 29 March 2004. - https://www.euskadi.eus/y22-bopv/es/p43aBOPVWebWar/VerParalelo.do?cd2004002578