such term or such a term?

Solution 1:

As @Peter Shor stated, you are reading something written in legalese, which is not necessarily written by lawyers, but used whenever a definition which may come under scrutiny is needed. Such language is often used by companies making products for human "consumption', in anticipation of a need to defend itself in a court of law.

An opinion of the oblique nature of legalese:

To American lawyers, a 22-year-old document is 'ancient,' while a 17-year-old person is an 'infant.' At one time or another, the law has defined 'dead person' to include nuns, 'daughter' to include son, and 'cow' to include horse; it has even declared white to be black.