Notwithstanding any other provision of this chapter, the State Department of Agriculture shall not register or otherwise authorize the use of the pesticide thiram as a repellent on forest tree seedlings after June 1, 1977, unless a report to the department made pursuant to ORS § 634.410 to 634.425 states that thiram may be used for such purpose without creating a serious health or safety hazard to individuals involved in reforestation activities who handle tree seedlings treated with thiram and that adequate precautionary measures may be reasonably undertaken to offset any substantial hazards involved in the use of thiram. [1975 c.777 § 4]