stipulation
noun [ C or U ] formal uk/ˌstɪp.jəˈleɪ.ʃən/ us/ˌstɪp.jəˈleɪ.ʃən/
规定，约定；明确的要求
a rule that must be followed or something that must be done
Is there any stipulation concerning the number of people attending the conference? 参加会议的人数方面有什么明确的要求吗？
[ + that ] The only stipulation is that candidates must be over the age of 35. 唯一的规定是候选人必须年满35岁。