The velar fricative is given as prenasalized in the chart, but not in the sample text. There is also a rule stating that ⁿɣ becomes ⁿɣ after a nasal vowel. It is assumed here that it isn't prenasalized.
Allophonic rules
b >
ⁿb / after a nasal vowel
tʰ >
t / (non-canonical form - i.e. alternate representation of the phoneme)
d >
ⁿd / after a nasal vowel
kʰ >
k / (non-canonical form - i.e. alternate representation of the phoneme)
g >
ⁿg / after a nasal vowel
dʒ >
ⁿdʒ / after a nasal vowel
ɸ >
ɸʷ / before back vowels
ɸ >
f / before front vowels
β >
βʷ / before back vowels
ɣ >
ⁿɣ / after a nasal vowel
ɾ >
l / (non-canonical form - i.e. alternate representation of the phoneme)