SIDCGL’s use of C-Tech on its website also violates Section 2.1 of Chapter 4 of the same document which states that “Except in case of proprietary purchase from a selected single source, reference to brand names, catalogue numbers or other details that limit any materials or items to specific manufacturer(s) should be provided as far as possible. Where unavoidable, such items descriptions should always be followed by the words “or substantially equivalent”. So what is the catch here?