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по взаимному согласию Сторон stresses
law	by mutual consent of the Parties (Michelle_Catherine)
по взаимному согласию сторон
gen.	mutually agreed upon between the parties (reverso.net kee46)
busin.	at the mutual agreement by the parties (Praline)
notar.	mutual consent of the parties (Yeldar Azanbayev)
по взаимному обоюдному согласию сторон
econ.	by mutual consent of the parties; by mutual agreement of the parties

по взаимному согласию Сторон: 8 phrases in 5 subjects

Business	1
Diplomacy	1
General	2
Insurance	1
Law	3