mandatory requirement

基本解释

Each gold medal will have a mandatory requirement of 6 grams of gold.
每一块金牌必须达到含金量不少于6克的强制性要求。
Also, setting the public URI for all participating servers is a mandatory requirement.
同样，为所有参与的服务器都设置公共 URI，这是一个强制性的要求。
Not only will it become the mandatory requirement for newly produced vehicle, but also the integrant part of in-use vehicle I/M system management.
不仅将作为新生产车辆强制性要求的要素，也将成为在用车I/M制度管理的重要内容。
gatefanyi.com

There is a suggestion that the mandatory requirement for quarterly reporting be dropped, but multinational companies will still have to report quarterly to their American investors.
ECONOMIST: Why equity markets have forgotten their function
And also potentially associated with other problems of social communication to this point, but it does become a lower variable of potential contribution of effect with the more restrictive criteria of the DSM5, and as always less of a potential contributing factor with the Gillberg Criteria that makes a mandatory requirement of criteria for motor development and language impairments.
FORBES: Abuse Of Mom In Childhood And Autism Risk