1. Crypto-asset service providers operating a trading platform for crypto-assets which operate trading systems on a price visibility-time priority shall maintain a record of the priority time stamp for all orders as specified in field 12 of Table 2 of the Annex.
2. Crypto-asset service providers operating a trading platform for crypto-assets which operate trading systems on a size-time priority basis shall maintain a record of the quantities which determine the priority of orders as specified in field 13 of Table 2 of the Annex and the priority time stamp referred to in paragraph 1.
3. Crypto-asset service providers operating a trading platform for crypto-assets which use a combination of price-visibility-time priority and size-time priority and display orders on their order book in time priority shall maintain a record of the priority time stamp for all orders as specified in field 12 of Table 2 of the Annex.
4. Crypto-asset service providers operating a trading platform for crypto-assets which use a combination of price-visibility-time priority and size-time priority and display orders on their order book in size-time priority shall maintain a record of the quantities which determine the priority of orders as specified in field 13 of Table 2 of the Annex and the priority time stamp referred to in paragraph 1.
5. Crypto-asset service providers operating a trading platform for crypto-assets shall assign and maintain a sequence number for each event as specified in field 14 of Table 2 of the Annex.