There is no global body that governs the frequencies used for RFID. In principle, every country can set its own rules for this.
Low Frequency (125 – 134.2 kHz and 140 – 148.5 kHz) and High Frequency (13.56 MHz) can be used globally without a license. Ultra High Frequency (868 MHz – 928 MHz) cannot be used globally as there is no single global standard. These frequencies are known as the Industrial Scientific and Medical (ISM) bands.
Some standards that have been set for RFID technology include:
RFID for animals, advanced transponders
Standard for very popular HF (13.56 MHz), used for RFID enabled passports
Standard for HF (13.56 MHz), used for contact smart payment and credit cards.
New UHF (433 MHz) industry standard for active RFID.
Standard for UHF RFID.
Standards for electronic product code.