party to a treaty

基本解释

They are also not a party to the Schengen Treaty, however, you can only access Andorra via Spain and France which are party to the treaty and they don't have an airport, so no one worries about them.
他们也不是申根国，你只能通过申根国西班牙和法国进入安道尔。不过由于安道尔并没有自己的机场，所以没有人会为此担心。。
I hereby declare that I am a tax resident of the other contracting party to the tax treaty and the purpose of becoming such a tax resident is not to obtain the tax treaty benefits.
我谨声明，我为需享受税收协定缔约对方税收居民，我成为缔约对方税收居民并非为了获得税收协定利益而安排。
www.gd-n-tax.gov.cn

Past experience suggests, however, that the very fact that we are party to a treaty regime may actually make it less likely that we will detect and seek redress of violations.
CENTERFORSECURITYPOLICY: Center for Security Policy EXCERPTS OF TESTIMONY BY FRANK J. GAFFNEY, JR. before the SENATE ARMED SERVICES COMMITTEE
The Center for Security Policy deplores the suggestion made by some self-appointed "authorities" on chemical weapons matters to the effect that this reality should not stand in the way of the United States quickly becoming a party to a treaty banning these weapons.
CENTERFORSECURITYPOLICY: Center for Security Policy Chemical Weapons Arms Control: Formula For Disaster For US Security