 Likewise, restricted entry intervals are the amount of time to allow residue concentrations to decrease before a worker can reenter an area where pesticides have been applied without protective equipment.Some countries use the International Maximum Residue Limits -Codex Alimentarius to define the residue limits; this was established by Food and Agriculture Organization of the United Nations (FAO) and World Health Organization (WHO) in 1963 to develop international food standards, guidelines codes of practices, and recommendation for food safety.Currently the CODEX has 185 Member Countries and 1 member organization (EU).