Another point of discussion is the proportion of trade unionists. Opponents say that after the PLA, business leaders must hire their workers through unions and unionized workers are the majority of those working on PLA projects, although non-unionized workers make up the majority of construction workers.  Estimates of the proportion of non-unionists cited by PLA opponents are about 85%, based on figures from the Us Department of Labor Bureau of Labor Statistics and more recent data put the figure at 86.9%.  This figure is disputed by Denas, who indicates that the figures of opponents of the PLA are misleading and are based on census data that included an overly broad concept of a construction worker.  According to a 2010 Cornell University study cited by Mary Vogel, Executive Director of the Construction Institute, 60% of construction trades are unionized in Massachusetts.  Since its inception in 1998, The Construction Institute, a non-profit organization, has focused on the needs of the construction union sector in Massachusetts. Whether it is a house, an apartment or a condo, there is a good chance that the project will have to be approved by a local government or, for condominiums, by the housing association. Present the final plans and submit them while you apply for a building permit to complete the construction for a specified period of time, usually 6 to 24 months, depending on the duration of construction. b) Architects have the power to order the removal of defective materials or works from the works in order to order replacement materials in accordance with this agreement and schedules. Groups such as the Associated General Contractors of America (AGC),  Associated Builders and Contractors (ABC),  Construction Industry Roundtable (CIRT), the National Federation of Independent Affairs (NFIB), the National Black Chamber of Commerce(U.S. Chamber of Commerce) have actively opposed the use of PLA, particularly for government projects. These groups have questioned the application of such agreements through litigation, lobbying and public relations campaigns.  Opponents of the PLA supported Bush`s executive order, which prohibits government-mandated LBAs, and argued that between 2001 and 2008, when the executive order was in effect, no federal project had experienced significant work problems, delays or cost overruns due to the absence of ALP.
 According to the applicants, who oppose THE ACCORDS, the agreements restrict the recruitment and work practices of contractors and may result in higher costs for project owners.  One of their objections to the PLA is that the agreements require contractors to contribute to union performance plans and comply with the labour rules of trade unions.  In addition, they oppose the use of LDCs to limit the hiring of projects to construction workers who have been chosen by unions through tenant unions, and argue that this does not improve the quality of workers, since all those who are admitted to a trade have at least the same level of education and qualification, whether or not they belong to a union.  Reports and studies on the costs of PROJETS on construction projects have shown that they may not result in increased costs, such as a 2002 Harvard University Joint Center for Housing Studies paper, which indicates that the increase in costs cited by PLA opponents is based on bids, not on final costs. According to the document, the final cost of a project due to construction costs would generally be higher than the cost of supply.  In addition, a 2004 report by the Director General of General Services in Contra Costa County, California, indicated that bids for five out of eight PROJECTS submitted to a PLA were lower than the cost estimate for architects/engineers.  In 2004, a report on the use of ALP in Iowa indicated that the use of PLA improves the efficiency and cost-effectiveness of construction projects.