Each such classification has it own choice of law rules but distinguishing between procedural and substantive rules requires care.

The question thus arises whether substantive fundamental rules of natural justice may be developed by local courts.

Procedural and substantive rules were akin to those in United States courts.

The power extends to substantive rules as well as procedural rules.

In order to ensure this, the Commission is clarifying its present substantive rules.

On the other hand, we have this tendency to want to unify the substantive rule of European contract law.

Part I sets out substantive rules of customs valuation.

There is a close relationship between substantive rules embodied by contract and uniform trade terms so embodied.

Indeed, they differ from substantive rules only in that the latter have no dictionary function.

The prescription of a conflicts rule, though more readily agreed than a substantive rule, is very much the second best solution.