Missouri officials said Thursday that more than $3 million medical marijuana license fees have been paid since the state began accepting pre-filed applications a month ago.

In a statement, Department of Health and Senior Services spokeswoman Lisa Cox said 418 "pre-filed application forms" have been sent in, accompanied by a total of $3,020,000 in fees. The totals include:

226 forms for dispensary facilities;

128 forms for cultivation facilities; and

64 forms for infused-product manufacturing facilities.

Since voters approved medical marijuana in November, the state has been working to implement Amendment 2, which calls for a system of 192 dispensaries to be readied by early 2020 to sell cannabis products — but only to qualifying patients with serious health problems.

The amendment sets up the following fee schedule:

Patient fees are $25 per year;

Dispensary fees are $6,000 initially, then $10,000 per year;

Cultivation fees are $10,000 initially, then $25,000 per year; and

Infused-products fees are $6,000 initially, then $10,000 per year.

The state will issue at least 61 licenses to cultivate marijuana, which works out to one cultivator license per 100,000 Missouri residents, according to the amendment.

At least 82 licenses will be issued to makers of cannabis-infused products like edibles, vapors and oils.

More:When can I get my medical marijuana 'prescription'? A timeline for Amendment 2.

More:All about Amendment 2, the medical marijuana proposal approved in Missouri on Tuesday

Under the text of the amendment, by June 4, application forms and instructions are to be made available for patients and for would-be operators of dispensary, manufacturing and growing operations.

By July 4, the Department of Health and Senior Services must begin accepting license applications for qualifying patients.

By Aug. 4, the state must begin accepting license applications for dispensary, cultivation and manufacturing operations.

Those applications must be approved no later than Dec. 31, per the amendment.

The identities of the people and companies that want to cash in on medical marijuana's arrival in Missouri remain a secret.

Media organizations such as the News-Leader and the St. Louis Post-Dispatch have made requests for copies of forms submitted by people and companies with their fees, or for lists of names of such people and companies.

The state has repeatedly declined to make that information public. In a Thursday email responding to a request made by the News-Leader, the DHSS spokeswoman explained the decision by saying that the department will "continue to stand behind our interpretation of the Article XVI Section 1.3(5) of the Missouri Constitution."

That section of Amendment 2 requires DHSS to "maintain the confidentiality of reports or other information obtained from an applicant or licensee."

Backers of Amendment 2 have said that provision of the legal text is not meant to shield the identities of business-related medical marijuana license applicants from public disclosure.

A week ago, the St. Louis Post-Dispatch sued state government over the issue, asking a judge to order DHSS to release copies of documents submitted with the pre-filed fees.

More:

Missouri officials will hold a medical marijuana forum in Jefferson City next week

Missouri will have 192 medical marijuana dispensaries by 2020, backers of Amendment 2 say

Missouri's medical marijuana amendment takes effect today. Here's what to expect.