ISO 3720:2011

ISO 3720:2011 specifies the parts of a named plant that are suitable for making black tea for consumption as a beverage and the chemical requirements for black tea that are used to indicate that tea from that source has been produced in accordance with good production practice.
ISO 3720:2011 also specifies the packing and marking requirements for black tea in containers.
ISO 3720:2011 is not applicable to scented or decaffeinated black tea.