Throughout the duration of exploration and operating licenses, it is mandatory to have the operations carried out under the supervision of an engineer with a relevant degree. In the event of carrying out operations without a technical supervisor, the guarantee of the license shall be recorded as revenue and operations shall be ceased. The technical supervisor shall fulfill his/her duties and responsibilities by observing scientific and technical principles in the exploration, research, development and production of the resource. However, in natural mineral water establishments, any individual who has a relevant engineering degree may be present as the technical supervisor. It is mandatory for the exploration and operating activity reports that are prepared by the technical supervisor or supervisors to be submitted to the Administration by the license holder in two copies, by the end of March of the following year. A copy of the activity reports shall be forwarded to MTA by the Administration. In the event that the exploration and operating activity reports are not submitted to the Administration within the prescribed time period, the guarantee shall be recorded as revenue with two equal installments for each month and a two-month extension shall be granted. If the activity report is not submitted before the end of the extension period, the exploratory license shall be revoked and MIGEM shall be notified.