The Providence Journal  goes on to say

Each tag would cost $150 for patients who grow their own plants or $350 for caregivers who are allowed to cultivate marijuana for up to five patients.

The requirement is meant to create more of a “level playing field” between caregivers and compassion centers, which grow marijuana on a large-scale basis and are already subjected to more rigorous regulations and taxes, according to Michael Raia, spokesman for the state Executive Office of Health and Human Services.

Full Report http://www.providencejournal.com/news/20160202/ri-would-raise-revenue-by-tagging-medical-marijuana-plants

Budget  http://omb.ri.gov/budget/prioryear/operating/2017.php