Well.... to married couples (it does to we singles, as you might know)
Which is important to remember in this discussion.  Since the sexual  revolution of the 1960's, there is no Catholic teaching (official or  informal) of "No Kids?  No Sex!"  Nope.  In the Catholic Family Planning  and Birth Control, sex is welcomed.  As much as desired.  "More than  usual" as Catholic posters here have noted (one trice).  It's not about  abstinence (that's the former Catholic position - unofficially), it's  about HAVING sex but contraceptively - with the means and end of not  conceiving, with the intent of HAVING sex ("more than otherwise") but  "rendering procreation unlikely."  Sex done contraceptively.   Contraceptive sex.  Contraception. It is what it is.  I'm not saying  it's good or bad, moral or immoral, pious or impious (I'm actually  entirely uncertain), I'm just saying it is what it is.   (And that I  UNDERSTAND why many regard it as "double talk", I'm not saying it is,  I'm saying I sure understand why nearly EVERY Catholic known to me  considers it so).  
You seem desirous of noting the OFFICIAL position.  Sure.   So, what  does it say?  A couple (let's assume for valid reasons) wants no  children - for at  least the next 5 years.  Is the official position now  in Catholic Family Planning and Birth Control that ergo for at least 5 years they are to  have no sex ("No kids?  NO sex!")?   Abstinence?   OR is the official   position that they may have sex (perhaps as much as desired, perhaps a  great abundance of sex, perhaps more than otherwise) but it will teach them how to do it  contraceptively, so as to render procreation impossible?  Contraception?    Does NFP teach NO SEX EVER or CONTRACEPTIVE sex?