condition 4 is that there has been no change to the lease since it was granted which would have the effect of making the rent payable under the lease less than a market rent
amod 4 yw na chafwyd unrhyw newid i’r les ers iddi gael ei rhoi a fyddai’n golygu bod y rhent sy’n daladwy o dan y les yn llai na rhent marchnadol