There are justification under Art 36 TFEU for the violations of Art 34 TFEU, there two types, one is the Art 36 justifications and the other is the Casiss de Dijon mandatory requirements, can you please assist me on which one I should be using for the question below and please add any case law suggestions. thank!

The question

Ambrosia recently introduced a new National Marketing Law (NML) for dental products which limits their sale to special shops through which all Ambrosian companies producing artificial teeth have been selling their products.The preamble to the NML explains thatthis limitation to special shops is motivated by the need to defend the Ambrosian artificial teeth industry. Belugan companies have been selling their teeth directly to Ambrosian dentists and dental clinics through the internet,a practice with which they are now prevented from continuing by the NML.