He tried to persuade a local banker to loan more money to the villagers, but the banker refused, insisting they didn't qualify for credit. So, Yunus started his own bank to help the poorest of the poor lift themselves up.
The banker applied strict qualification rules to money lending
As per the article the banker would not lend money unless they 'qualified' for credit, hence applying rules to the lending process.
( z1 apply :ARG0 ( z2 banker ) :ARG1 ( z3 rule :topic ( z4 qualify ) :mod ( z5 strict ) ) :ARG2 ( z6 lend :ARG0 z2 :ARG1 ( z7 money ) ) )