After its initial success, the in 1907 established training system and its regulations had proven to be substandard.

"The regulations will prove to be a hollow shell if the resources are not available."

The regulations that are adopted to implement the law may well prove critical to how effectively it works.

Legalisation, regulation and taxation has proven to lead to a decrease in drug consumption.

Large-scale regulation proved even more challenging than enforcing state and local ordinances.

I believe that this regulation has proved to be very effective in practice.

The so-called stringent regulations will prove to be relatively lightweight in practice.

The existing regulations have proven themselves in practice and already allow for some exceptions.

British regulations on their own haven't proved a great success in the past.

However, these regulations have proven difficult to enforce.