Except as otherwise provided in this title, the general provisions relating to public employment, including hospitalization and medical aid as provided in chapter
41.04 RCW, and the application of federal social security for public employees, the acceptance of old age and survivors insurance as provided in chapters
41.47 and
41.48 RCW, military leave as provided in RCW
38.40.060, self-insurance as provided in chapter
48.62 RCW, the application of industrial insurance as provided in Title
51 RCW, and chapter
43.101 RCW relating to training of law enforcement officers, shall apply to code cities. Any code city may retain any civil service system theretofore in effect in such city and may adopt any system of civil service which would be available to any class of city under general law.