When is "muttar" l'chatchila? And when is it b'di'avad?

See Shulchan Aruch Yoreh Dei'ah 69:4

The SA ends with "Muttar"

How does the SA mean this?

Does the SA Mean
It is l'chatchila Muttar to salt only one side of a piece of meat?

OR

Does the SA Mean
B'di'avad it's Muttar to use a piece of meat that has been salted on only one side?

The key here is the position or juxtaposition of the term "Muttar"

KT
RRW