http://www.fightingrobots.co.uk/docu...uild-Rules.pdf

7.8 LiPo
Lithium Polymer batteries have specific limitations and extra precautions which must be adhered to.

7.8.3 Fusing
A fuse rated below the maximum burst discharge of the battery MUST be fitted. The maximum burst
discharge current is calculated by multiplying the C rating by the capacity. E.g. 25C 2200mAh = 55 Amp

No regulations for other chemistries.