The FEI Anti-Doping Rules for Human Athletes (ADRHA)

As a Signatory of the World Anti-Doping Agency (WADA) Code, the FEI has developed Anti-Doping Rules for Human Athletes (ADRHA) in compliance with the Code as well as with WADA’s International Standards*.
On 1 January 2021 revised versions of the Code, International Standards and ADRHA came into effect.
In the FEI's ADRHA, specific requirements apply to "International-Level Athletes". These are the athletes falling under either of the two following criteria:
  1) Athletes ranked as listed below in the Ranking(s) applicable on 1 January for the year considered in any of the FEI disciplines (all Rankings can be accessed) here:
   - Jumping: top 500 of the FEI Jumping World Rankings (= “Longines Rankings”)
   - Dressage: top 300 of the FEI Dressage World Rankings
   - Eventing: top 300 of the FEI Eventing World Rankings
   - Para Dressage: top 100 of the FEI Para Dressage World Rankings (= "World Individual Rankings")
   - Endurance: top 100 of the FEI Endurance World Rankings
   - Driving: top 100 of the FEI Driving World Rankings
   - Vaulting: top 100 of the FEI Vaulting World Rankings
   - Reining: top 100 of the FEI Reining World Rankings

   2) Athletes included in the FEI’s Registered Testing Pool (RTP) and/or Testing Pool (TP).

* WADA's eight International Standards are mandatory documents that aim to bring harmonisation among anti-doping organisations in various technical areas:

The International Standard for Testing and Investigations (ISTI)
The International Standard for Laboratories (ISL)
The International Standard for Therapeutic Use Exemptions (ISTUE)
The International Standard for the Prohibited List (The List)
The International Standard for the Protection of Privacy and Personal Information (ISPPPI)
The International Standard for Code Compliance by Signatories (ISCCS)
The International Standard for Education (ISE)
The International Standard for Results Management (ISRM)

FEI Anti-Doping Rules for Human Athletes Library & References
The FEI Anti-Doping Rules for Human Athletes
The World Anti-Doping Agency (WADA)
The WADA Code 2021 (on the same page can be found the clean version, the redline from 2015 version, and a summary of the major changes from the Code 2015) 
WADA's Prohibited List effective 1 January 2021
WADA's International Standards
FEI Anti-Doping Privacy Policy