11.   WASHINGTON BUSH SIGNS BORDER-SECURITY MEASURE President Bush signed legislation to improve border security and to toughen enforcement of immigration laws.

12.   Wood said the agency will toughen its enforcement as it continues to encourage a more open, but orderly, energy market.

13.   In documents presented to parliament, the government called for toughening tax enforcement, raising some rates and cutting exemptions to help ease a severe budget crisis.

14.   In early March, Patterson filed bills clarifying the definition of a Jamaican citizen, toughening human rights enforcement and laying the framework for a bill of rights.

15.   Signed Texas law toughening enforcement of child-support orders.

16.   The government has been toughening its enforcement of environmental regulations since the spill, partly because of pressure from environmental groups.

17.   The statute draft passed late Thursday night toughens enforcement and penalties against companies that copy foreign patents and would also place some limits on patenting of microorganisms.

18.   The United States is pushing hard for Vietnam to toughen its enforcement of intellectual property rights.