The post-bipolar world order, transitional in nature, lacks an established set of institutional norms and rules that would provide a place for arms control in the general system of international security. Many aspects of the world order that directly affect the arms control architecture have already changed, and this factor largely destructs existing arms control regimes. With the current world order in transition, which combines elements of the old order and new factors and interdependencies, it would be reasonable to take a hybrid approach to arms control where a well-structured and legally binding core addressing nuclear risks would be accompanied by flexible application of more liberal formats, making it possible to strengthen and develop periphery areas that were previously not covered by the relevant rules or lost them due to the cancellation of relevant agreements. This approach could preserve the disintegrating regimes by using more flexible means of substitution and modernize the core by establishing and improving arms control regimes in previously uncovered areas.