Since 1954 when Congress authorized the Copyright Office to prepare a series of studies to serve as background for revision hearings, copyright has been one of the major issues in librarianship. Although the impact that the New Copyright Law will have on interlibrary loan activity is yet to be determined, there is a need to know whether present library practices can be expected to comply with the new guidelines. This paper is the report on an attempt to apply the CONTU Guidelines of the proviso portion of Subsection 108(g)(2) to the interlibrary loan records for periodicals for 1976, 1977, and the first quarter of 1978 at a large special scientific library, the National Oceanic and Atmospheric Administration (NOAA) Library in Boulder, Colorado. For the three time periods in question, over 63 percent of requests were found to be for articles published within 10 years of the date of request, and more than 79 percent of requests involved five or fewer articles per periodical per year. Violations of the five copy limit amounted to 1.02 percent of requests in 1976 and 0.94 percent of requests in 1977; no violations were identified for the first quarter of 1978. Various graphs and tables of data are included. (Author)