As the bachelor-master subdivision in the Netherlands is fairly recent, most master's programs are so-called "Connecting Master's". These are designed for students graduating from one specific bachelor's program at that same university. All students who graduated from that bachelor's program (and sometimes hand-picked similar programs at other Dutch universities) are accepted into the Masters automatically. If by a "BSc that meets the requirements", you mean that you completed one of these bachelor's program that should qualify you for automatic admission, you should be able to build a much stronger case than worrying about who was on the committe.
On the other hand, students who did not graduate from one of these selected bachelor's programs have to apply to the university for a certificate of admission (bewijs van toelating). The application procedure is left up to the individual universities to define and implement. The conditions for acceptance will depend on the specific program you applied for. This means that (assuming you fall into this category) you should base your appeal on the university policies for the application procedure, and the program's requirements.
The admission requirements should be detailed in the "onderwijs- en examenregeling" of the program you're applying for, and should match the education goals of the preceding bachelor's program.
Source: Wet op het hoger onderwijs en wetenschappelijk onderzoek, Artikel 7.30a.