But many labor contracts contain such requirements, known as union security provisions, and the lower courts are split on their validity.
The Bush administration would have us believe that international law contains only ambiguous or advisory requirements.
Parts of this notice contain certain requirements which are mandatory.
The quality protocol for flat glass contains requirements that prevent a material becoming waste.
The individual volumes contain technical requirements and guidance on a wide range of topics.
The new law should contain specific requirements for plant safety.
The Act contains similar requirements to those in civil proceedings.
Although we have not been able to agree on binding targets, the directive does contain specific requirements for action at the national level.
However, the report also contains requirements for minimum wage systems.
The authorisation will contain specific requirements which must be met in operating the process.