Sharing with you some research I was doing on unassigned 2 letter callsigns. On or about the Available date (could be + or - a day or two, and will not fall on a weekend day)
Relevant to the above list of callsigns. In the case of a deceased amateur, Industry Canada policy allows for a member of the immediate family to apply for the call sign. Immediate family includes father, mother, step-parent, foster parent, guardian, brother, sister, spouse, child, grandchild, stepchild and adopted members of the family.
If no family member has applied for the call sign within one year of the death, it will be returned to the block of available call signs.