After a re-read of the agreement, it looks like your thinking that this could be the last tranche is correct. LAM is given shares that they are to sell into the market in order to pay off the debt. From what they sell, they keep 40% and 60% goes toward the debt.
So, if this is them selling, once they sell $476,127 worth of shares, the debt should be gone. This would require them selling all 425,300,000 at an average price of roughly $0.0011. If they can achieve the $476K at a higher average price (where they would be so far), they have to return any excess shares to SRMX.
My understanding, anyway. Please check my math.
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