(2) The principal of invested endowed care funds shall never be voluntarily reduced, but shall be maintained separate and distinct by the trustee or custodian from all other funds except that it shall be proper to commingle endowment care funds with special care funds. The payment of charges chargeable against principal under ORS chapter 129 or of other expenses necessarily incurred in the administration of the trust in accordance with subsection (1) of this section shall not constitute a voluntary reduction of principal. The net income earned shall be used solely for the general care and maintenance of the cemetery property entitled to endowment care, as stipulated in the resolution, bylaw and other action or instrument by which the fund was established, and in such manner as the cemetery authority may from time to time determine to be in the best interests of such endowed property. Such net income shall never be used for the improvement or embellishment of undeveloped property offered for sale. [Amended by 1955 c.545 §4; 1985 c.450 §3; 1987 c.295 §3; 1995 c.157 §24; 1995 c.297 §1; 2003 c.279 §32; 2005 c.348 §125]