thefish
that is not CA penal code but the restrictions placed by a specific Sheriff on that carry license.
They can place whatever restrictions they want and some counties place more than others.
There is nothing in California state law for example that says you cannot carry concealed if you have a carry license while drinking.
Nothing that says you cannot go into an establishment that serves alcohol or makes most of its money from alcohol.
Nothing that says you cannot be under the influence of prescription medication.
In fact under California law you can be intoxicated and in a bar and carrying.
While legal prescription drugs also should have no legal disqualification. The only exception would be state legal marijuana use, which would still be illegal at the federal level, and an additional crime to use and possess while carrying a gun.
The thing is in California most of the population lives in counties that do not give permits to regular people.
While far inland in counties with very low population densities and rural communities you have several counties that are like going back in time, and have views that one would expect in the 1950s elsewhere in the country.
There is some great aspects to these places, but there is also additional restrictions and expectations, and you have found one of them.
Sheriffs in some of such counties may place restrictions that include whatever they want.
The issue of the license is discretionary in the state, and the terms they put on it are as well.
However the terms they put on it do not carry the power of law. They may revoke the permit for a violation, but it is not the law.
Restrictions they put that are already the law also don't matter, because it is already the law, whether they say not to do it or they are silent on the subject.
The only restrictions on that list that are the law are:
Impede any peace officer in the performance of his/her duties.
Present himself/herself as a peace officer to any person unless he/she is, in fact, a peace officer as defined by California law.
Unjustifiably display a concealed weapon.
They are not worded in proper legal jargon but they are the law.
You cannot impersonate a peace officer, interfere with peace officers lawfully performing their duties, or brandish a weapon. That is already state law.
While
" Refuse to show the license or surrender the concealed weapon to any peace officer upon demand"
is probably best followed as well because irregardless of the law arguing with a cop while they want a gun you won't give them is not a place you want to be, but I don't believe it is the law for a permit holder. (The game laws do state anyone hunting must do so for inspection to insure compliance with game laws. Also that anyone carrying an unloaded gun back when unloaded carry was legal before this year must turn it over to any officer that requested so they could check that it was unloaded. Neither of which apply to someone with a carry permit.)
However the rest of the restrictions are those imposed by the Sheriff that issues the license.
Another county may have entirely different restrictions.