CET quota is for the students who apply through KCET exam.

In order to apply for KCET you need a domicile certificate of Karnataka. 

Students outside Karnataka state can apply through PESSAT. 

To apply through PESSAT you can refer below link

http://pessat.cbexams.com/pessatreg/default.aspx

To be eligible you should have 50% marks in your 12th class in science stream. 

To check the seats through both the exams you can refer below link

http://pes.edu/pessat/intake-courses/

Good Luck!!