To enter the design award, do you have to use the official vex iq design notebook or can you use your own?
In VRC I know that all that you need is a bound notebook.
oh well talking abt vex iq- i just need to be sure
In IQ, I believe that you can use your own. I would suggest using the VEX one anyways, as it comes with your team registration and VEX sells them on their website for pretty cheap.
All the information you need about award eligibility can be found in the Judge Guide.
See in particular the description of the design award on page 13 and the rubrics on pages 43 and 44.
To answer your particular question, there is no requirement that you use the official notebook.