To the extent allowable, payment or reimbursement of the expenses of emergency treatment, not previously authorized, in a private or public (or Federal) hospital not operated by the Department of Veterans Affairs, or of any emergency treatment not previously authorized including transportation will be paid on the basis of a claim timely filed, under the following circumstances:

(a) For veterans with service connected disabilities. Emergency treatment not previously authorized was rendered to a veteran in need of such emergency treatment:

(1) For an adjudicated service-connected disability;

(2) For nonservice-connected disabilities associated with and held to be aggravating an adjudicated service-connected disability;

(3) For any disability of a veteran who has a total disability permanent in nature resulting from a service-connected disability (does not apply outside of the States, Territories, and possessions of the United States, the District of Columbia, and the Commonwealth of Puerto Rico); or

(4) For any illness, injury or dental condition in the case of a veteran who is participating in a rehabilitation program under 38 U.S.C. ch. 31 and who is medically determined to be in need of hospital care or medical services for any of the reasons enumerated in § 17.47(i)(2); and