Each and all of the respective areas of land organized as a water district and heretofore attempted to be merged into a sewer district under chapter 148 of the Laws of 1969 [ex. sess.], and amendments thereto, and which have maintained their organization as part of a sewer district since the date of such attempted merger, are hereby validated and declared to be a proper merger of a water district into a sewer district. Such district shall have the respective boundaries set forth in their merger proceedings as shown by the official files of the legislative authority of the county in which such merged district is located. All debts, contracts, bonds, and other obligations heretofore executed in connection with or in pursuance of such attempted organization, and any and all assessments or levies and all other actions taken by such districts or by their respective officers acting under such attempted organization, are hereby declared legal and valid and of full force and effect. Such districts may hereafter exercise their powers only to the extent permitted by and in accordance with the provisions of *RCW
56.36.060, as now or hereafter amended.