However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or consistent with contractor's legal duty to furnish information. Basic knowledge of the proper way to trim, spray, mow, remove trash and debris, weed, fertilize, sweep, rake, cultivate, dig, water, shovel or plow snow, remove ice, spread salt and/or sand and other related functions.