The real regulations that you need to know about are located here -
http://www.iata.org/ps/publications/dgr ... npublishedBut they are very expensive... The Easy Dangerous Goods regulations, for example, is over $1000 for a 12 month licence.
Actually, see if you can get the numbers out of
HERE or
HERE or
HEREThen apply those numbers to the formula on page 161 of this document
http://www.iata.org/whatwedo/cargo/dang ... %20EHS.pdfThen if the numbers stack up, argue with someone at the airport that it is safe to fly with Hexamine tablets...
Having just looked into it as far as I could (as is obvious from those links), I wouldn't bother trying to fly with them.
If you are going to Macpac, one would assume you are going to Christchurch. So one of these places might have a cheap stove, or maybe one to hire?
LINKGood luck!
EDIT.
That first "
HERE" link has got some good info on Hexamine tablets (and to think we used to play with them in Scouts

...) -
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
Highly flammable. May cause sensitization by inhalation and skin contact.
AFTER INHALATION
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
AFTER SKIN CONTACT
In case of skin contact, flush with copious amounts of water for at least 15 minutes. Remove contaminated clothing and shoes. Call a physician.
AFTER EYE CONTACT
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.
AFTER INGESTION
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
EXPLOSION DATA
Dust Potential: This material, like most materials in powder form, is capable of creating a dust explosion.
EXTINGUISHING MEDIA
Suitable: Water spray. Carbon dioxide, dry chemical powder, or appropriate foam.
SPECIAL RISKS
Specific Hazard(s): Flammable solid. Emits toxic fumes under fire conditions