Do I need a PIN for registering my k-4 courses?

Yes or No.

Yes: You need a PIN to register all your general education courses, and blocked courses in your sophomore year. These courses include: ECH 210, ECH 220 for semester 3, and ECH 253, ECH 260, EEC 273 for semester 4.

No: You don't need the PIN for registration of blocked courses in you junior and senior year. However,You also need PIN to register EEC course in your junior and senior year.