An "ancillary" agreement concluded in August 1993 to enforce existing national labour law, the North American Agreement on Labour Cooperation (NAALC) , was severely limited. He focused on health and safety standards and child labour law, excluding collective bargaining issues, and his so-called "[enforcement]" teeth were only accessible at the end of a "long and winding" litigation process.  Obligations to enforce existing labour law have also raised questions of democratic practice.  Canada`s pro-Canada Network anti-NAFTA coalition suggested that minimum standards guarantees would "not be meaningful" without "comprehensive democratic reforms in [Mexican] courts, unions, and government."  However, a subsequent evaluation indicated that the NAALC`s principles and complaint mechanisms "have created a new space for supporters to form coalitions and take concrete steps to articulate the challenges of the status quo and promote workers` interests."  Economists largely agree that NAFTA benefits North American economies. Regional trade grew sharply in the first two decades of the contract [PDF], which rose from about $290 billion in 1993 to more than $1.1 trillion in 2016. Cross-border investment also increased, with U.S. foreign direct investment (FDI) equities in Mexico rising from $15 billion to more than $100 billion over that period. However, experts also say it has proven difficult to draw the direct effects of the agreement on other factors, including rapid technological change and expanding trade with countries like China. Meanwhile, discussions continue on the impact of NAFTA on employment and wages. Some workers and sectors have faced painful disruptions due to the loss of market share due to increased competition, while others have benefited from the new opportunities offered by the market. In order to increase cross-border trade, the United States has entered into an agreement with Mexico and Canada to increase their de minimis shipping value.
For the first time in decades, Canada will increase from C$20 ($15.38) to C$40 ($30.77) for taxes. Canada also provides duty-free shipments of up to C$150 ($115.38). Mexico will continue to provide $50 tax-free de minimis and will also offer duty-free shipments worth $117. Dissemination values up to these levels would occur with a minimum of formal entry procedures, making it easier for more businesses, especially small and medium-sized enterprises, to be part of cross-border trade. Canada will also allow the importer to pay taxes 90 days after entry. The NORTH AMERICAN FREE TRADE AGREEMENT (NAFTA), which entered into force in 1994 and created a free trade area for Mexico, Canada and the United States, is the main feature of the bilateral trade relationship between the United States and Mexico. As of January 1, 2008, all tariffs and quotas on U.S. exports to Mexico and Canada were eliminated under the North American Free Trade Agreement (NAFTA). Shortly after his election, U.S. President Donald Trump said he would begin renegotiating NAFTA terms to resolve trade issues he had campaigned for. The leaders of Canada and Mexico have expressed their willingness to cooperate with the Trump administration.  Although he is vague about the exact terms he wants in a renegotiated NAFTA, Trump has threatened to withdraw from it if negotiations fail.
 After Donald Trump was elected president, a number of trade experts said that a withdrawal from NAFTA, as Trump had proposed, would have a series of unintended consequences for the United States, including limited access to the largest U.S. export markets, reduced economic growth, and higher gasoline prices, cars, fruits and vegetables.  The most affected sectors are textiles, agriculture and automotive.   Such trade benefits often escape attention, because although the costs are highly concentrated in certain sectors such as the automotive industry, the benefits of an agreement such as NAFTA are widely distributed across society. . . .