It shall be unlawful for any person or persons, firm, corporation or agency to plant within any zone designated and delimited by the said regents or in any neutral zone designated and delimited by the said regents, any strain, variety or species of plants forbidden to be grown in the said neutral zone and allow the same to grow to the stage in which buds are produced; provided that the regents shall prescribe the one strain or variety which may be grown within a designated zone or neutral zone and which may be allowed to grow to maturity for the purpose of the production of pure strains of seed.
NMS § 76-10-6