Whenever extremities spread completely and the spreading rendered a tamei tahor, when they return, they render him tamei. Whenever extremities return and the returning rendered a tahor tamei, [if] they became covered [with nega], he is tahor. If they became uncovered, he is tamei, even a hundred times.

Anywhere subject to becoming tamei from nega of baheres impedes the [status of] complete spreading. Anywhere not subject to becoming tamei from nega of baheres does not impede the [status of] complete spreading. How so? [The nega] covered him completely except for the head or the beard, [or except for] on a raw boil, burn, or wound [lit. onto a rebellious boil, burn, or wound]. [If the hair of] the head or beard fell out; [or] the boil, burn, or wound partially healed, they [allow him to] remain tahor. [If] it covered him completely except for [an area the size] of half a lentil next to the head, beard, boil, burn, or wound, [and] subsequently [the hair of] the head or beard fell out, or the boil, burn or wound partially healed, even if the normal-looking skin became afflicted with baheres, he is tamei until it covers him completely.