Sentence:  Subject to the limitations of this Act , the Secretary shall make stabilization payments to small domestic producers upon presentation 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 <WSD>provided</WSD> in this Act . 
Meaning of the word marked with <WSD> tags:  determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation