
It is better to read the verses around these ones as well, but I don't want to use up space!
There are (at least) two ways to read this. David Pawson from 'Unlocking the Bible' says:
1. A Christian woman may not give away any material thing without permission from her husband.
2. This still stands today.
But, I would rather say:
1. Nowhere in these verses does it say that the woman needs to get her husband's permission before making a pledge or vow. (Although he may nullify it if he finds out and disapproves.)
2. The verses limit the husband's power over the woman in saying that he may only object if he does so immediately. Thus he may not abuse his power by changing his mind or inventing objections to suit himself later.
3. As with all Levitical law this is modified (at least) for use today.
Not so easy, really to understand. But you can see that the verses can be interpreted as being on the one hand oppressive to women or on the other as being liberating!