Items to be included in the QRH whether by "memory", or "read and do" are not solely at the discretion of the manufacturer and operator. The controlling agency is a party to the manual approval process too when comes to manual content.
For example. The black lines on the upper surface of the wing. If there is ice or frost accumulation within the boarder of these lines as a result of NEI, per Boeing, action may not be required.
Takeoff with light coatings of cold-soaked fuel frost on upper wing surfaces is allowable, provided the following conditions are met:
• the frost on the upper surface is less than 1/16 inch (1.5 mm) in thickness
• the extent of the frost is similar on both wings
• the frost is on or between the black lines defining the allowable cold-soaked fuel frost area (see figure) with no ice or frost on the leading edges or control surfaces
• the ambient air temperature is above freezing (0°C, 32°F)
• there is no precipitation or visible moisture (rain, snow, drizzle or fog with less than 1 mile visibility, etc.) If all the above criteria are not met, all ice or frost on the wings must be removed using appropriate deicing/anti-icing procedures.
Some aviation authorities do allow this and thus require that the area be de-iced before departure, be it by natural means (warm fuel into the wings), or using an approved method of de-icing if a short turn is required.