What is the Procedure to seek permission from DC to buy Agriculture Land by Non-Agriculturist

Hi Experts, While I read that in Karnataka, an individual less than 25L P/A of non-Agricultural income can buy Agriculture land, I would like to know what is the procedure for obtaining such a permission from DC. Please guide me on the below : a. To which DC office should I apply seeking permission - Should I apply to the DC at the address where the land is located or should it be to the DC where the individual reside. (In my case, I reside at Bangalore and the land I want to purchase is in Mandya District). b. Can we apply online through Sakala seeking permission from DC or should it be made going in person to DC office. c. What is the estimated expense to seek such a permission. d. What is the criteria other than the income limit for an individual to seek permission (like should he have any evidence of agricultural experience, any evidence of knowledge he should present etc. e. Is there any specific format or an specific application which I should use to seek permission. Please guide through the above queries and links. Thanks in advance.