Sentence examples for that were obligatory from inspiring English sources

"The demotic affectations – glottal stops, photo-ops in greasy spoon cafes, an affected love of football – that were obligatory 15 years ago have completely disappeared... Barely a day goes past, it seems, when you cannot pick up a newspaper and find the latest sensation in music, or film, or literature, expounding on an early life of dormitories, tuck shops and 'prep'.

In the 1960's, I participated in all of those school parties for Valentine's Day that were obligatory in the classrooms around the country, where you would buy those cheap valentines and use a cardboard box for a mailbox and stuff it with valentines for all of your classmates.

Specifically, we propose that tetramers are consumed within milliseconds to yield octamers that are obligatory intermediates toward ULF formation.

These studies have identified two anionic amino acids, D126 and E172, that are obligatory for ligand binding.

As a disseminator of the news, the paper shall observe the decencies that are obligatory upon a private gentleman.

In fact, 'tis the season to talk about other things: there are some autumn conversations that are obligatory.

But Mr. Page has showed newfound warmth on earnings conference calls that are obligatory for chief executives.

In fact, the control engineer using such a model may not know all relevant details (e.g. nonlinearities) that are obligatory in order to get appropriate estimations.

Mr. Garcia has been particularly troubled by the Somalis' demand that they be allowed special breaks for prayers that are obligatory for devout Muslims.

"Demons" has the nudity and gore that are obligatory in this category, though it's more circumspect than soft-core romps like "Spartacus" or "The Tudors".

In Spain, Amnesty International found, officers routinely detain black people and members of other ethnic minorities on suspicion of drug dealing or of not carrying the identity documents that are obligatory in Spain.