In the European Union (EU), the cultivation of certain cannabis varieties is granted provided they are registered in the EU’s Common Catalogue of Varieties of Agricultural Plant Species  and the THC content does not exceed 0.2% of the dried flowers of the plant . In Canada, hemp is allowed to contain 0.3% THC , while Switzerland allows up to 1% THC . In most countries, viable seeds for planting may be purchased from certified seed companies only, in order to make sure that the correct hemp variety is indeed being cultivated. Additionally, hemp may typically only be grown in agricultural fields outdoors, while indoor cultivation is usually forbidden. In some countries (e.g., The Netherlands), growing hemp is allowed only with the intent to produce fibers or seeds. As a result, the act of harvesting fiber cannabis for its CBD is a violation of narcotics laws . New cannabis varieties (for example developed to yield a higher content of CBD) are not (yet) registered as approved hemp varieties, and therefore cannot be freely cultivated, while the official registration process takes several years to complete.
Cannabidiol is currently a class B1 controlled drug in New Zealand under the Misuse of Drugs Act. It is also a prescription medicine under the Medicines Act. In 2017 the rules were changed so that anyone wanting to use it could go to the Health Ministry for approval. Prior to this, the only way to obtain a prescription was to seek the personal approval of the Minister of Health.