The phrase "and requires a certain" is correct and usable in written English.
It can be used when discussing conditions or prerequisites that must be met for something to occur or be valid.
Example: "The project is complex and requires a certain level of expertise to complete successfully."
Alternatives: "and necessitates a specific" or "and demands a particular".
The scale-up of chemical processes is not such a trivial process and requires a certain understanding of the involved steps.
But when you are in the grips of compulsion, yeah, there is a process going on that of course isn't healthy and requires a certain amount of cognitive and emotional and probably therapeutic work to get out of.
"When there is no market, the value of securities based on FAS 157 becomes somewhat difficult and requires a certain amount of judgement," said Willumstad, who ran AIG for just three months in the run-up to its bail-out.
"It's barrier-breaking and requires a certain amount of virtuosity from the players and I will draw on my theatre experience, working on the timing to fit the film and dialogue.
The federal Renewable Fuel Standard, which sets targets for renewable fuel production and requires a certain amount to be blended into conventional gasoline and diesel, has been the main catalyst for the growth of several companies exploring new technologies.
This is not an easy road as she points out, and requires a certain combination of skills and some dedication.
The nuts go off audibly, and require a certain virtuosity.
Homes and cars both are big-ticket assets, and require a certain degree of wealth or income to afford.
Individual passengers have their own specific characteristics: when standing, they occupy a certain portion of space and require a certain distance from other passengers.
Just like almost every other multi-function watch though, these features are buried underneath layers of multi-button presses and require a certain level of technical patience.
He writes about guns from a personal perspective, taking the stance that they are a sporting item and require a certain amount of expertise much like those who like to shoot a bow and arrow.
