Sentence:  "<WSD>Parev</WSD> ice" includes Kosher ice and means the substance intended for sale for human consumption which resembles ice-cream and which— / (a) is usually known as <WSD>Parev</WSD> ice or Kosher ice, and / (b) contains no milk or milk derivatives, ... 
Meaning of the word marked with <WSD> tags:  Of food: that has no meat or milk in any form as an ingredient.