(Direct copy from the document)
7. Punishment for burning or attempting to burden houses in the country. -- The willful and malicious burning a dwelling house on a farm or plantation, or elsewhere, (not in a city, town or village) or the setting fire thereto, in the nighttime, when the said house is actually occupied by a person or persons, with the intent to burn the same, when committed by a slave or free person of color, shall be punished by death.
The reason why the law got more details are because it happened in real life. It is not like they are making up thing that they would not do but more of the things they did and want to stop them from doing it again. Most of the slave laws are helpful for the owners but almost no rights to the slaves. It just gives the reason for the owner to say "the law said".
Source - http://academic.udayton.edu/race/02rights/slavelaw.htm#11.
7. Punishment for burning or attempting to burden houses in the country. -- The willful and malicious burning a dwelling house on a farm or plantation, or elsewhere, (not in a city, town or village) or the setting fire thereto, in the nighttime, when the said house is actually occupied by a person or persons, with the intent to burn the same, when committed by a slave or free person of color, shall be punished by death.
The reason why the law got more details are because it happened in real life. It is not like they are making up thing that they would not do but more of the things they did and want to stop them from doing it again. Most of the slave laws are helpful for the owners but almost no rights to the slaves. It just gives the reason for the owner to say "the law said".
Source - http://academic.udayton.edu/race/02rights/slavelaw.htm#11.