A determination of the existence of the alleged dependency will be made upon consideration of all facts relating to dependency, and upon such investigation of such facts as may be warranted. The following facts as existing at the time of the death of the veteran, or at any time thereafter and on or before January 2, 1935, or where it is established that the veteran is deceased as provided in section 312(a), at the beginning of such 7-year period or at any time thereafter and before the expiration of such period, shall be taken into consideration in determining dependency in a given case:
38 C.F.R. § 10.33