Non-Engineer Owned Constructor Firms Guidelines for Constructors/Operators Category – C3 Application Form: Non Engr. Owned, New Registration, C3 Application Form: Non Engr. Owned, Renewal (without any change in previous license), C3 Application Form: Non Engr. Owned, Renewal (with change), Up-gradation (any category), Misc, C3 Category – C4 Application Form: Non Engr. Owned, New Registration, C4 Application Form: Non Engr. Owned, Renewal (without any change in previous license), C4 Application Form: Non Engr. Owned, Renewal (with change), Up-gradation (any category), Misc, C4 Category – C5 Application Form: Non Engr. Owned, New Registration, C5 Application Form: Non Engr. Owned, Renewal (without any change in previous license), C5 Application Form: Non Engr. Owned, Renewal (with change), Up-gradation (any category), Misc, C5 Category – C6 Application Form: Non Engr. Owned, New Registration, C6 Application Form: Non Engr. Owned, Renewal (without any change in previous license), C6 Application Form: Non Engr. Owned, Renewal (with change), Up-gradation (any category), Misc, C6