A holding clearance issued by ATC includes at least:
In the absence of an outbound DME being issued by ATC, pilots are expected to time the holding pattern in accordance with sub-sections below:
During entry and holding, pilots manually flying the aircraft are expected to make all turns to achieve an average bank angle of at least 25° or a rate of turn of 3° per second, whichever requires the lesser bank. Unless the ATC clearance contains instructions to the contrary, or a non-standard holding pattern is published at the holding fix, pilots are expected to make all turns to the right after initial entry into the holding pattern.
Occasionally, a pilot may reach a clearance limit before obtaining further clearance from ATC. In this event, where a holding pattern is published at the clearance limit, the pilot is to hold as published. Where no holding pattern is published, the pilot is to hold in a standard pattern on the inbound track to such clearance limit and request further clearance.
If communication cannot be established with ATC, the pilot should then proceed in accordance with communication failure procedures.
REFERENCES AIM RAC 10.2 Holding Clearance