Sentence:  Subject to the limitations of this Act , the Secretary shall make stabilization payments to small domestic producers upon <WSD>presentation</WSD> of evidence satisfactory to him of their status as such producers and of the sale by them of newly mined ores , or concentrates produced therefrom , as provided in this Act . 
Meaning of the word marked with <WSD> tags:  the activity of formally presenting something (as a prize or reward)