Hammond, Louisiana-based First Guaranty Bank has agreed to operate under a consent order concerning the credit quality of its borrowers, the lender said Friday in a filing with the Securities and Exchange Commission. Under the order, which took effect Friday, First Guaranty must maintain a Tier 1 leverage capital ratio of 9% or more and a total risk-based capital ratio of at least 14%. The bank is restricted from paying any dividend to its holding company while under the order without the regulators’ prior written consent. The bank noted its Tier 1 leverage capital ratio was 7.09% as of June 30, and its total risk-based capital ratio was 16.21%. Overall, the bank reported $3.4 million in profit in the second quarter, a turnaround from a $7.3 million loss a year earlier.