There is no way claimed instrument flight time can be audited by the Regulator. That leads to wholesale faking of IMC (in cloud) instrument flying hours in log books. Basically it is left to the honesty of the pilot how he chooses to log instrument flying.
Some log 0.3 hours instrument time (including taxy time)for every flight they do whether CAVOK or not. Some regulators approve any flight requiring an IFR flight plan to be logged as instrument flight. Some log books have a column for Actual and another column for Simulated instrument flight. Simulated meaning practice instrument flying under the hood in a real aircraft. Actual means "in cloud or black night"
In the old days the only instrument flying to be legally logged as such was hand flying only in real IMC. That is the true test of flying skill. Auto pilot instrument flight was never to be logged as that was considered cheating since there is no instrument handling skill needed to monitor the instruments especially while eating your meal
Every Regulator seems to have different rules on logging of instrument flying. At an airline interview make sure to explain the rules under which you logged your instrument flying time since faking of hours is common.
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Last edited by Centaurus; 24th January 2019 at 12:28.