stipulationnoun [ C or U ]
uk/ˌstɪp.jəˈleɪ.ʃən/us/ˌstɪp.jəˈleɪ.ʃən/formala rule that must be followed or something that must be done:
Is there any stipulation concerning the number of people attending the conference?
[ + that ] The only stipulation is that candidates must be over the age of 35.