On April 20, which each year marks the unofficial “420” holiday for marijuana enthusiasts worldwide, lawyers at big firms across the country spoke with The Am Law Daily about their work in the burgeoning field of semilegal weed.

Though still not allowed under federal law, rapidly changing state regulations have created a relatively new industry worth roughly $5.7 billion. Clients looking to get involved in funding, growing or selling cannabis are calling upon lawyers to handle venture capital, finance, intellectual property, real estate, employment and regulatory work.