All vessels berthed or at anchorage area in Brazilian waters must comply with the small flag dress rule on next May 1st (i.e. Labor Day) as determined on NORMAM 22/DPC issued by the Brazilian Navy Authority.
The small flag dress consists of two Brazilian flags hoisted on the top of each highest mast FWD and AFT from sunrise up to sunset.
In case of non-compliance with a mentioned rule, a vessel can be fined by Harbor Master.
For more information: WSS Santos