(December 18, 2019, 10:54 AM EST) -- WASHINGTON, D.C. — The National Labor Relations Board in a 3-1 decision issued Dec. 17 overruled a 2015 decision that required a case-by-case determination on confidentiality during a workplace investigation and instead held that an employer’s “investigative confidentiality rules are lawful” (Apogee Retail LLC and Kathy Johnson, Nos. 27-CA-191574 and 27-CA-198058, NLRB)....