Some things were strictly in place though outside of grooming.
For example, the Storybook Canal boats were only allowed to be narrated by women.
Not at first.
Storybook Land Canal Boats (called
Canal Boats of the World in 1955) was operated by men for the first few years. Only after the name was changed to Storybook Land and the engineering behind the boats had improved to the point that ride operators weren't having to do on-the-fly engine maintenance when their boat died out on the canal was that ride changed to women only.
Here is a photo from 1955, when it was Canal Boats of the World (AKA "the mud bank ride" because there wasn't anything but muddy banks to look at) showing the male ride operator at the rear right of the boat wearing the cap.
And here is a photo from Life Magazine in 1957 also showing a male ride operator standing at the back of the seating compartment operating the boat.
This photo below is from 1958 and you can see that the Storybook Land villages have been filled in. Men are still operating the ride, as seen by the male with his arms crossed at the back of the boat on the right, or the man with the hat in the boat at left. They didn't have loudspeakers then either, the hosts just sort of bellowed and pointed out what you were seeing along the riverbanks.
By about 1960 the operation of this Fantasyland attraction had been improved enough and feminized enough that only women were allowed to operate the attraction. That ladies only rule lasted until the mid 1990's, at the same time women were allowed to operate the Jungle Cruise, Submarines and Canoes, and men were allowed to operate the Tiki Room, Mr. Lincoln, and CircleVision.
Here we see Storybook Land Canal Boats in the early 1960's. The men are gone, replaced by lovely hostesses in red frocks who perch on the back of the boat and finally use microphones to deliver their spiels to the passengers.
The operation of Disneyland, and the codifying of its principles and management techniques did not just instantly pop into being in July, 1955.
It was a years long process that wasn't really finished until the early 1960's. That includes CM grooming standards and rules for how they appeared in the park.