While this subject comes up from time to time, there is no specific delay in place as it relates towards the creation or editing of recently deceased Notables. Others have recommended this approach in the past, however, at least an equal number if not more have also requested the opportunity to begin working on their profiles as soon as possible. While some believe it is honoring to a recently deceased Notable to delay work on any profiles for a period of time, others believe that it is more honoring to show their respect by creating a well-done profile and family tree for the same. While we all grieve differently, it is difficult to tell someone that they're wrong for wanting to approach things differently than we might agree upon.
Beyond the fact that it may be challenging to judge others on their approach towards recently deceased Notables, it is also technically impossible to prevent. Living Notables often have a profile already created and in a Private place that would be changed upon a Notable's death. If we choose not to put a date of death on these for a period of time, others will presume that no profile exists, and create duplicates and begin work on them. Even if we put a date of death and restrict who can work on it, there is no way to prevent someone from creating a duplicate and working on it until the other is opened up for editing. Most of these are created by accident (at least 99% of the time), and ultimately we will merge them as our goal is one profile per person, but it does create a mess that needs to be cleaned up.
So realistically, it is more collaborative, more technically feasible, and best practice to not establish any specific recently deceased Notable moratorium so that we can keep the system clean and allow those who wish to honor Notables by helping to establish their profile and tree to do so at their own pace.